Drag each item to indicate whether it is a positive or negative impact of dams.
Positive -
Negative -
water storage, energy production, control of water, trapping of river-borne nutrients, deepening of riverbed, high salt concentrations
positive - water storage, energy production, control of water
negative - trapping of river-borne nutrients, deepening of riverbed, high salt concentrations
Answers
Positive - water storage, energy production, control of water
Negative - trapping of river-borne nutrients, deepening of riverbed, high salt concentrations.
It is a positive or negative impact of dams.
Downstream ecosystems will be organically replenished by the dam. It deprives a river of its sediment load and attempts to recapture it by corroding the banks and riverbed. The groundwater table is lowered as a result of riverbed deepening, making it inaccessible to aquatic plant roots.
River dam construction has an impact on biosphere-wide biological processes. The majority of reservoirs provide a sizable contribution to greenhouse gas emissions. Recent studies indicate that biological processes that act as a "carbon sink" for greenhouse gases are driven by the flow of nutrients and sediment.
Dam construction has a variety of detrimental effects on the environment. A huge dam can have a wide range of negative environmental effects. It has a direct impact on the environment's and rivers' chemical, physical, and biological characteristics.
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Related Questions
Fully explain how cellular respiration is a chemical process whereby the bonds of food molecules and oxygen molecules are broken and the bonds in new compounds are formed resulting in a net transfer of energy.
Answers
During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water. Along the way, some ATP is produced directly in the reactions that transform glucose. Much more ATP, however, is produced later in a process called oxidative phosphorylation. Oxidative phosphorylation is powered by the movement of electrons through the electron transport chain, a series of proteins embedded in the inner membrane of the mitochondrion.
These electrons come originally from glucose and are shuttled to the electron transport chain when they gain electrons.
As electrons move down the chain, energy is released and used to pump protons out of the matrix, forming a gradient. Protons flow back into the matrix through an enzyme called ATP synthase, making ATP. At the end of the electron transport chain, oxygen accepts electrons and takes up protons to form water. Glycolysis can take place without oxygen in a process called fermentation. The other three stages of cellular respiration—pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation—require oxygen in order to occur. Only oxidative phosphorylation uses oxygen directly, but the other two stages can't run without oxidative phosphorylation.). As electrons move down the chain, energy is released and used to pump protons out of the matrix, forming a gradient. Protons flow back into the matrix through an enzyme called ATP synthase, making ATP. At the end of the electron transport chain, oxygen accepts electrons and takes up protons to form water.
Glycolysis can take place without oxygen in a process called fermentation. The other three stages of cellular respiration—pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation—require oxygen in order to occur. Only oxidative phosphorylation uses oxygen directly, but the other two stages can't run without oxidative phosphorylation.
Cellular respiration is a metabolic process called cellular respiration that converts glucose to ATP.
What is cellular respiration?Cellular respiration has the processes: Glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation are the phases of cellular respiration.
A glucose molecule gradually decomposes into carbon dioxide and water during cellular respiration. In the process of transforming glucose, some ATP is directly created.
But far more ATP is later created through a procedure known as oxidative phosphorylation. The electron transport chain, a collection of proteins enmeshed in the inner membrane of the mitochondrion, is what drives oxidative phosphorylation.
Therefore, Cellular respiration is a metabolic procedure by which glucose is changed into ATP.
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26. why does the acceleration remain constant despite the changing direction of the lady bug?
Answers
In uniform circular motion, an object moves at a constant speed around a circular path. Although the speed remains constant, the velocity changes continuously because the direction of motion changes. The change in velocity leads to an acceleration, which is always directed toward the center of the circle.
This acceleration is called **centripetal acceleration** and is given by the formula:
`a_c = v^2 / r`
where `a_c` is the centripetal acceleration, `v` is the constant speed, and `r` is the radius of the circular path.
The centripetal acceleration remains constant because the speed (v) and the radius (r) of the circular path are constant. However, the direction of the centripetal acceleration changes as the ladybug moves around the circle, always pointing toward the center of the circle. This change in direction does not affect the magnitude of the acceleration, which remains constant.
help me with this please
Answers
Answer:
I WILL HELP YOU........
1. What is the relationship between DNA and gene expression? How do they depend on each other? 2. Why is it important for the “on” and “off” mechanism of gene regulation? 3. Since there are DNA segments that do not code for amino acids, what is their purpose? simple explanations and URL of the websites used for answers.
Answers
When we are talking of DNA, genes, we must remember that when a gene is transcripted to primary RNA it is formed by two types of segments, exons, and introns. Those coding are exons and those not coding are Introns. About these last (introns) there has been a wide discussion about its function, there are some who even call it junk DNA. Their function is not quite understood yet, there has been a recent increase in the interest in these noncoding sequences and several hypotheses regarding their function in the chromosome. It has been proposed that introns could motivate recombination and remotion of certain genetic groups through the evolutive process, recent evidence indicates that Introns contribute to maintaining stability, sometimes suppressing the activity of other genes, helping in the evolutive process.
Describe, fully, how you could use a microscope to observe some blood cells.
Answers
Answer:
Place a drop of blood onto a microscope slide. Add a drop of stain to the blood to make the cells easier to see. Carefully place a coverslip over the drop of blood. Sliding it slightly along the microscope slide will spread out the blood cells making them easier to see.
Answer:
To observe blood cells using a microscope, you will need a microscope, microscope slide, cover slip, a sample of blood, and a dropper.
First, clean the microscope slide and cover slip with a cleaning solution and let them dry.Next, use a dropper to place a small drop of blood in the center of the slide.Place the cover slip over the blood drop carefully, ensuring there are no air bubbles.Place the slide on the microscope stage and secure it with the clips.Turn on the microscope and adjust the objective lens to the lowest magnification.Use the coarse adjustment knob to bring the blood cells into focus.Once you have located the blood cells, you can increase the magnification by adjusting the objective lens to a higher magnification.Observe the blood cells under the microscope and take note of their shape, size, and color.To get a better view of the blood cells, you can adjust the focus using the fine adjustment knob.Once you have finished observing the blood cells, turn off the microscope and remove the slide.
Answer ASAP please What are small organelles found in large numbers in the cytoplasm of a cell called?
O Vacuole
O Mitochondria
O Ribosomes
O Chloroplast
Answers
Answer:
vacuole, let me know if it's right.
What is the texture of the puppy’s coat? What is the texture of the father’s coat?
Answers
Answer:
a puppys coat is like soft
and the fathers coat is hard and rough
Explanation:
Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of a white offspring in a cross between two heterozygous guinea pigs
Answers
Answer:
The probability of a white offspring is of 25%
Explanation:
To find the probability we can draw a 4-square Punnett square using the parents' alleles for the gene. If you want a more detailed explanation I would be glad to help :)
Answer:
25 is correct
Explanation:
I just did it on a test, I know I'm a year late.
a. A petrochemical process using established technology, to be built on an existing site b. A process for full-scale manufacture of a new drug, based on a process currently undergoing pilot plant trials c. A novel process for converting cellulose waste to fuel products
Answers
a. A petrochemical process employing established technology is a petrochemical process that employs technology that has previously been proved to be successful and efficient.
When opposed to a new, untested process, this sort of procedure is often chosen for its dependability and lower risk. b. A process for full-scale manufacture of a new drug based on a process that is currently undergoing pilot plant trials refers to a pharmaceutical industry process in which a new drug is manufactured using technology that has been tested on a smaller scale (pilot plant trials) and has shown promising results. This method is being ramped up in preparation for full-scale manufacturing. c. A unique process for converting technology cellulose waste to fuel products refers to a novel technique for converting cellulose waste to fuel products. cellulosic waste into fuel products. This procedure is new and unproven, but it may have advantages over existing processes, such as being more environmentally friendly or cost-effective.
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The Grand Canyon has much more than pretty scenery. It contains an amazing diversity of rock formations with an abundance of fossils hidden within. These fossils provide clues about past environments. The sedimentary rocks exposed throughout the canyon are rich in fossils, including fossils of these marine (ocean) brachiopod shells.
QUESTION: How does fossil evidence help you explain how the Grand Canyon formed? Write your answer
Answers
The most frequent fossils are small sea animals like gastropods, brachiopods, coral, and crinoids. When mixed with sandstone, this suggests that the region was a warmer, shallow sea at the time these sediments were created. The hyphae of rocks is a result of flooding.
What are bryozoans?Little aquatic invertebrates called bryozoans dwell in colonies. Colonies of many species form exterior protective structures called exoskeletons that mimic coral prosthetic limbs. Most colonies are anchored to a structure, such as a rock or sunken branch.
How do fossils work?Any surviving indication of a once-living thing from a previous geological age is known as a fossil. Examples include exoskeletons, bones, shells, animal or microbe imprints in stone, things preserved in glass, locks, fossil pine, and DNA traces. The fossil record is a collection of all fossils.
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Which of these organelles is NOT found in Animal Cells? Golgi Apparatus Chloroplasts Cell membrane Cell Wall (large) Central Vacuole Mitochondria
Answers
Answer:Chloroplasts,is NOT found in animal cells
Explanation:
Which of the following is true about evolution and natural selection? * (1 Point) An individual organism can develop necessary and desirable traits during its lifetime. An adaptation that helps an organism survive in one environment will always help with its survival in different times and settings. An acquired trait that an individual develops within its lifetime will be passed on to its offspring. Over time, a population changes because only the alleles of individuals who survive and reproduce are passed on to the next generations.
Answers
Evolution is the biological process through which living organisms gradually change over time, and natural selection is a mechanism for evolution. The following is true about evolution and natural selection:Over time, a population changes because only the alleles of individuals who survive and reproduce are passed on to the next generations.
In other words, natural selection favors certain traits and characteristics that allow organisms to better adapt to their environment, and these traits are passed down to future generations.An individual organism cannot develop necessary and desirable traits during its lifetime. An adaptation that helps an organism survive in one environment may not necessarily be useful in different settings.An acquired trait that an individual develops within its lifetime will not be passed on to its offspring.
Only genetic information, which is passed down through gametes during reproduction, is inherited by offspring.To summarize, natural selection is a key mechanism driving evolution, and it acts on the heritable traits of organisms, which are passed down through generations.
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Found throughout the nervous system, __________ aid and support the function of neurons. a. neurotransmitters b. somas c. glia d. reuptakes
Answers
Glia are cells that support and help neurons function throughout the nervous system.
What type of cell is responsible for the nervous system's primary function?Neuron, The neuron is the cell that conducts the majority of the nervous system's operations.
Which are frequently located within the cell body or soma of a mature neuron?The nucleus and other features seen in living cells are found in the soma, also known as the cell body, of a neuron. The most crucial of these processes, the synthesis of neurotransmitters, is supported by these structures. The CNS and PNS each contain one type of glial cell in addition to the four main types. Neuroglia, or "nerve glue," is the term used to refer to them all combined.
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The ingredients described above are used to make a bonding agent. The most important safety precaution to take when applying this bonding agent is to...
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lovastatin is used to lower cholesterol by inhibiting the function of which protein?
Answers
Lovastatin is used to lower cholesterol by inhibiting the function of the protein HMG-CoA reductase.
This enzyme, also known as 3-hydroxy-3-methylglutaryl-CoA reductase, plays a crucial role in the biosynthesis of cholesterol in the liver.
Lovastatin, as a statin drug, works by binding to the active site of HMG-CoA reductase, preventing it from converting HMG-CoA to mevalonate, which is an essential step in the production of cholesterol.
By inhibiting this protein, Lovastatin effectively reduces cholesterol levels in the blood, helping to decrease the risk of cardiovascular diseases.
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What is meant by dynamic equilibrium? Does this imply equal concentrations of each reactant and product?
Answers
Dynamic equilibrium refers to a state in a reversible chemical reaction where the rate of the forward reaction is equal to the rate of the reverse reaction.
In this state, the concentrations of reactants and products remain constant over time. It is important to note that dynamic equilibrium does not imply equal concentrations of each reactant and product. Instead, it signifies that the ratio of concentrations between reactants and products remains constant. This means that while the concentrations may not be equal, they are balanced in such a way that the reaction rates are equal. In dynamic equilibrium, both forward and reverse reactions continue to occur, but there is no net change in the overall concentrations of reactants and products. This state is reached when the rates of the forward and reverse reactions become equal, allowing for a stable system. The concept of dynamic equilibrium is fundamental in understanding chemical reactions and plays a crucial role in various scientific and industrial applications.
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What do arches and bacteria have in common ?
Answers
Answer:
-Bacteria contain fatty acids on the cell membrane, whereas archaea contain phytanyl. Explain the statement that both types, bacteria and archaea, have the same basic structures, but built from different chemical components. Both bacteria and archaea have cell membranes and they both contain a hydrophobic portion.
Explanation:
Archaea and bacteria are both prokaryotes, meaning they do not have a nucleus and lack membrane-bound organelles. ... Both archaea and bacteria have flagella, thread-like structures that allow organisms to move by propelling them through their environment.Bacteria contain fatty acids on the cell membrane, whereas archaea contain phytanyl. Explain the statement that both types, bacteria and archaea, have the same basic structures, but built from different chemical components. Both bacteria and archaea have cell membranes and they both contain a hydrophobic portion
DNA and RNA both use the same types of nucleotides
Answers
Answer:
No
Explanation:
In the nucleotide of DNA and RNA only Phosphate that is similar to both nucleic acid, They have different sugar portion and Nitrogenous base.
DNA nucleotide include
- Phosphate
- deoxyribose sugar
- NB Adenine, Thymine, Guanine and Cytosine
RNA nucleotide include
- Phosphate
- Ribose sugar
- NB Adenine, Uracil, Guanine and Cytosine
Therefore They do not use the same types of nucleotides because DNA has 2 strand that are joined together by weak hygrogen bond and it is long. while RNA has 1 strand and it is a short thus not coiled or helical.
The atoms move around randomly in a
•Gas
•Three
•Steam
•Shape
•Compressible
•Tightly
• Solid
•Intermolecular
•Matter
•Loosely
•Density
•Liquid
Answers
The atoms move around randomly in a gas, steam, and liquid.
Where does atoms move around randomly ?In a gas, atoms are free to move around in any direction and are not tightly packed together. They have high degree of kinetic energy, meaning they move quickly and randomly.
In steam, atoms are also free to move around but are in the gaseous phase at high temperatures and low pressures.
In liquid, atoms are also free to move around, but they are more closely packed together than in gas. The intermolecular forces between atoms are stronger, which allows them to maintain a fixed volume but still flow and take the shape of their container.
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explain how photosynthesis and cellular respiration work together
Answers
Answer: Photosynthesis makes a storable energy source, while respiration converts for individual cells. But because of photosynthesis and cellular respiration, energy from the sun is converted into a ATP that fuels the work of plant cells. Photosynthesis and respiration are both things that depend on each other. They both make what the other needs.
Explanation: Hope this helps have a wonderful rest of your day.
Fungi compose a very minor component of life in marine ecosystems yet are vital to the health of terrestrial ones. This is primarily due to their ability to:
Answers
Answer:
Break down lignin.
Explanation:
The continual slow degradation of the phenolic portions of lignin (humic acids) provides a long-term supply of nutrients to plants. Phytoplankton (the primary producers in aquatic systems) do not synthesize appreciable amounts of lignin, and so fungi are not necessary to decompose it!
What are the differences among the five biogeochemical cycle,particularly on the roles organisms play in them?
Answers
Answer:The most important biogeochemical cycles are the carbon cycle, nitrogen cycle, oxygen cycle, phosphorus cycle, and the water cycle. The biogeochemical cycles always have a state of equilibrium
Explanation:
Contrary to energy flow, matter, the building block of which organisms are made, flows through an ecosystem in several cycles, from one organism to the next and from living things to the abiotic environment and back.
What are biogeochemical cycles?
The flow of nutrients and other elements between biotic and abiotic forces is referred to as "biogeochemical cycles." The words "bio" and "geo," which refer to the biosphere, "geo" and "chemical," which refer to the elements that flow through a cycle, are the roots of the phrase "biogeochemical."
Atoms make up the preserved stuff that exists on Earth. Since matter cannot be generated or destroyed, it is recycled in a variety of ways throughout the earth's system. The remainder of the elements are present in a closed system, and the earth receives energy from the sun that is reflected back as heat. Major components include:
CarbonHydrogenNitrogenOxygenPhosphorusSulfurThe biotic and abiotic parts of the ecosystem recycle these substances. The abiotic elements of the ecosystem are the lithosphere, hydrosphere, and atmosphere.
Therefore, contrary to energy flow, matter—the building block of all living things—moves through an ecosystem in a variety of cycles, from one creature to the next and from the abiotic environment to the living ones and back again.
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A student views a cell under a microscope. The student makes the claim
that the cell is from a plant and not an animal. Figure 1 shows a sketch the
student makes while viewing the cell.
Which statements best support the student's claim?
Figure 1. Cell Sketch
Nucleus
Mitochondria
Vacuole
-Cytoplasm
-Cell
Membrane
Ribosomes
Cell Wall
Chloroplasts
Select two of the five statements.
A) The cell contains the structures used for protein synthesis.
B) The cell contains the structures used for cellular respiration.
C) The cell contains the structure that holds genetic information.
D) The cell contains the rigid structure that supports and protects the cell.
E) The cell contains the structures that can convert light energy to chemical energy.
Answers
The two statements that support the student's claim that the cell is from a plant and not an animal are option (D) and (E).
D) The cell contains the rigid structure that supports and protects the cell. This claim is made in reference to the existence of a cell wall, which is a distinguishing trait of plant cells and offers structural support and protection.
E) The cell contains the structures that can convert light energy to chemical energy. The existence of chloroplasts, which are in charge of photosynthesis in plant cells, is referenced in this remark. They absorb light energy and transform it into glucose-based chemical energy.
Both the presence of a cell wall and chloroplasts are specific to plant cells and are not typically found in animal cells, thus supporting the student's claim.
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true or false. the genetic foundation of a particular phenotype that includes contributions of dna from both parents.
Answers
The genetic foundation of a particular phenotype that includes contributions of DNA from both parents.This statement is true.
Every gene in an organism has one allele, which is inherited from each of the organism's parents. When both parents pass on the same allele of a gene, the resultant child is said to be homozygous (homo means "same") for that allele. The genetic make-up of a particular organism is known as its genotype. The term genotype is used by biologists to distinguish between an organism's phenotype, which comprises its observable traits, and its genotype.
So, the genetic foundation of a particular phenotype that includes contributions of DNA from both parents are called homozygous individuals.
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where is the inherited information that determines a cell’s function?
Answers
Answer:
Genes
Explanation:
The hereditary information (inherited information) is contained in genes, located in the chromosomes of each cell.
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what is the ultimate higher-order olfactory destination?
Answers
The ultimate higher-order olfactory destination is the olfactory cortex, specifically the piriform cortex.
It is responsible for processing and analyzing olfactory information received from the olfactory bulb, which is the primary processing center for smell. The piriform cortex plays a crucial role in odor perception, recognition, and memory formation associated with smells.
It receives input from the olfactory bulb and sends outputs to various regions of the brain, including the amygdala (involved in emotional and associative responses to odors), the hippocampus (related to memory formation), and the orbitofrontal cortex (involved in the integration of sensory information with emotional and cognitive processes).
These connections allow for the complex interpretation and integration of olfactory information, contributing to our perception and experience of smell.
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what gives plants their green color?
Answers
Answer:
plants have a green pigment called Chlorophyll which gives them green colour
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Which of the following is a characteristic of sexual reproduction? Select all that apply.
A. Requires two parent organisms
B. Offspring are identical to the parent
C. Results in increasing the survival rate of the population
D. Extremely efficient
E. Can occur internally or externally
F. Offspring are genetically unique
Answers
A,E & F
What is sexual reproduction?
Sexual reproduction needs two parents to produce an offspring that is genetically unique. It can occur internally or externally. This type of reproduction is present in both animals and plants.
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How are negative stains different from other types of stains?.
Answers
Answer:
Negative stains dont come off?
Explanation:
Nucleic acid segments and are nucleic acids that can store biological information based on the sequence of their nucleotide monomers. Figure 1 shows a short segment of each of the two types of nucleic acids. Which of the following best describes a structural difference between and ?
Answers
Full Question (figure attached):
Nucleic acid segments and ar
DNA and RNA are nucleic acids that can store biological information based on the sequence of their nucleotide monomers. Figure 1 shows a short segment of each of the two types of nucleic acids. Which of the following best describes a structural difference between DNA and RNA?
A. DNA contains four types of nitrogenous bases, whereas RNA contains only two types of nitrogenous bases
B. The backbone of DNA contains deoxyibose, whereas the backbon e of RNA contains ribose.
C. A DNA molecule is composed of two parallel strands with the same 5'-3' directionality, whereas an RNA molecule is composed of only one strand
D. Phosphate groups provide rigidity to DNA, but RNA is flexible and contains no phosphate groups
Answer:
B. The backbone of DNA contains deoxyibose, whereas the backbon e of RNA contains ribose.
Explanation:
A. DNA contains four types of nitrogenous bases, whereas RNA contains only two types of nitrogenous bases - this is false. Both contain four types of nitrogenous bases. DNA contains cytosine, guanine, adenosine and thymine, whereas RNA contains cytosine, guanine, adenine, and uracil.
B. The backbone of DNA contains deoxyibose, whereas the backbon e of RNA contains ribose. - this is true, each nucleotide in DNA contains a deoxyribose sugar, whereas each nucleotide in RNA contains a ribose sugar
C. A DNA molecule is composed of two parallel strands with the same 5'-3' directionality, whereas an RNA molecule is composed of only one strand - this is false. DNA is composed of 2 strands, and RNA is composed of one, but the DNA strands run in an anti-parallel configuration (one runs 5'-3', the other runs 3'-5')
D. Phosphate groups provide rigidity to DNA, but RNA is flexible and contains no phosphate groups - this is false, both DNA and RNA nucleotides contain phosphate groups
