Which of the following statements about plankton or nekton is NOT correct?
a. Nekton are active swimmers.
b. Phytoplankton are important primary producers.
c. All plankton are closely related to plants.
d. Plankton drift or swim weakly.
e. Zooplankton are heterotrophic plankton.

A drug like nicotine that produces a biological response in the brain is called an dopamine agonist. Nicotine enters the brain within seconds of taking a cigarette. Nicotine promotes the release of brain chemicals known as neurotransmitters, which help regulate mood and behavior. Nicotine is a hazardous and extremely addicting substance.

It can increase blood pressure, heart rate, blood flow to the heart, and promote brain artery constriction (vessels that carry blood). Nicotine may also contribute to artery wall hardening, which may lead to a heart attack. Nicotine is a stimulant substance that speeds up the transmission of messages between the brain and the body.

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Answer:

It could mean that those two populations could be common ancestors because the spelling differences are the same

Explanation:

The similar spelling variations between the two populations could imply that they share common ancestry.

Deoxyribonucleic acid, or DNA, is the name given to the genetic material carried by humans and nearly all other species. An individual's DNA is present in nearly all of their cells.

Nucleotides are the molecular building components that make up DNA. A phosphate group, a sugar group, and one of four different nitrogen bases make up these building components. Nucleotides are joined into chains and the locations of the phosphate and sugar groups are switched to form DNA strands.

Every cell in the body has DNA in its nucleus. Groups of these firmly bound fragments make form chromosomes. The majority of people possess 46 pairs of chromosomes, or 23 pairs per pair.

Thus, The similar spelling variations between the two populations.

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Answer:

Observing chloroplasts in a cell under the microscope is evidence that the cell is a plant cell. Chloroplasts are organelles found in plant cells that are responsible for photosynthesis, the process by which plants convert sunlight into energy. Animal cells do not have chloroplasts, as they do not carry out photosynthesis.

Answer:

beacuse they need a strech

Explanation:

before wasting energy on stopping a response mechanism halfway through, you want to stop the process. feedback restraint at the outset.

Everything in cell metabolism happens extremely sequentially. A process will produce waste if you let it run on its own. First, the regulatory enzyme reduces waste by stopping the entire pathway.

Kinases are regulatory enzymes that make it easier to transfer phosphate groups to particular substrates. Protein kinases are one of the many types of kinases that play a role in controlling and further modifying cellular activity.

Citrate synthase, isocitrate dehydrogenase, and beta-ketoglutarate dehydrogenase are the three enzymes that control the TCA cycle. The irreversible stages of the TCA cycle, which are the primary point of regulation, are catalyzed by these enzymes, which are allosterically regulated.

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Explanation:

a rainforest plant will have a great number of large green leaves in order to capture the most amount of sunlight that is able to pass through to the lower levels in the rainforest. Also due to the humidity and low wind speed there isn't a high rate of transpiration.

whereas a desert plant where there is high temperatures, low humidity and high wind speed, plants such as cacti have torn as leaves which blocks the stomata in most cases to prevent water loss and to ward off predators, the cacti has roots that allow it to absorb water before it can evaporate

The term for a muscle contraction in which the proximal end moves toward the distal end is concentric contraction.

What is muscle contraction?

Muscle contraction refers to the activation of force-generating sites within muscle fibers. In a muscle contraction, a muscle cell or muscle fiber changes in length, creating tension by developing force against its load. This force is generated by the action of myosin heads, which bind to and slide along thin filaments of actin in the muscle fiber. There are different types of muscle contractions, including concentric, eccentric, and isometric.

What is a concentric contraction?

Concentric contractions happen when a muscle shortens to move a joint. The term "concentric" refers to the muscle shortening during contraction. For example, during a bicep curl, the bicep muscle contracts concentrically as it lifts the weight towards the shoulder. In a concentric contraction, the muscle's proximal end moves towards the distal end.

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Answer:

D) To build a molecule of mRNA

Explanation:

I hope this helps!!! :)

Artificial selection decreases population diversity by decreasing the rate of natural selection and change within a population.

Artificial selection occurs when humans select desirable traits or characters in an individual this includes plants and animals.

Natural selection occurs with nature, here traits that are heritable and allow the survival and reproduction of an individual leading to an increase in population are selected with nature.

Therefore, Artificial selection decreases the rate of natural selection and change within a population.

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Answer:

The answer is B. Artificial selection selects which traits (good or bad) are passed onto the next generation.

Explanation:

Just did it and got it right.

Answer:

c

Explanation:

planets are round because of their gravitational field acts as though it pulls everything from the center of its body and pulls everything toward it

Answer:

The African savanna ecosystem is a tropical grassland with warm temperatures year-round and with its highest seasonal rainfall in the summer. The savanna is characterized by grasses and small or dispersed trees that do not form a closed canopy, allowing sunlight to reach the ground. The African savanna contains a diverse community of organisms that interact to form a complex food web.

Among the given options, statement b. "The gametes are the haploid phase of the animal's life cycle" is true.

In the life cycle of animals, the gametes (sperm and egg cells) are the reproductive cells involved in sexual reproduction. Gametes are produced through a specialized cell division called meiosis, which reduces the chromosome number by half, resulting in haploid cells.

During sexual reproduction, haploid gametes from two parents combine to form a diploid zygote, which then develops into an organism. The zygote undergoes mitotic cell divisions, growing into a multicellular organism, and the diploid phase of the life cycle begins.

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Triclosan is a popular ingredient in cleaning products, specifically for killing bacteria, and is known for its antibacterial abilities.

After cleaning a desktop with a solution containing triclosan, it is very likely that live E. coli will not remain on the desktop. Many species of bacteria, including E. coli, have been successfully killed or prevented from growing by triclosan. The bacterial cell membrane is damaged by its mechanism of action, which also inhibits vital cellular processes.

While the addition of triclosan to the cleaning solution increases the likelihood of removing live E. coli, other elements and conditions must also be considered to determine the full effectiveness of the cleaning process.

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Answer:

 the probability (assumptions)of where the sand came from by the three friends may be

a. the thought that  the sand came from distant mountains and landforms.

b. the thought that the sand came from rocks on the ocean floor.”

c. he thought that  the sand came from undersea mountains and sea floor formations.

the best answer to this is the first probability answer (a)the thought that  the sand came from distant mountains and landforms.

it is very essential as a student to have an idea about weathering, erosion, deposition, and landforms.  if students/ individuals can identify/recognize that sand on a  beach may have come from distant mountains  and landforms due to rock weathering , deposition or erosion.

Explanation:

The statement which is an example of ethos is (A). Dr. Kim, an expert on cardiovascular disease, recommends eating a healthy diet to improve heart function.

Dr. Kim is an expert on cardiovascular disease, so it is an example of ethos. Since Dr. Kim is an expert, the audience is more likely to believe the statement made by him than they would if it were coming from someone who is not an expert in cardiovascular disease.

People are more likely to listen to individuals with expertise and experience in their field. When a speaker establishes credibility, they also increase the likelihood that their audience will be receptive to their message.

Therefore, Dr. Kim's statement is an example of ethos because he is an expert on cardiovascular disease, and his knowledge and expertise make him credible and trustworthy. The correct answer is A.

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Explanation:

Raquel has gross pay of $732 and federal tax withholdings of $62. Determine Raquel’s net pay if she has the additional items withheld: Social Security tax that is 6. 2% of her gross pay Medicare tax that is 1. 45% of her gross pay state tax that is 21% of her federal tax a. $600. 99 b. $610. 54 c. $641. 83 d. $662. 99.

Each cell in the body has mitochondria and cytoplasm, which are where cellular respiration takes place.

The membrane-bound cell organelles known as mitochondria are responsible for producing the majority of the chemical energy required to drive a cell's metabolic functions (mitochondrion, singular). The majority of a cell's energy is produced by mitochondria, which also contain specific genetic material that differs from that present in the nucleus.

The cellular organelles known as mitochondria carry out the process of turning food energy into a form that cells can use. There are hundreds to thousands of mitochondria in each cell, which are found in the fluid surrounding the nucleus of the cell (the cytoplasm).

Each cell in your heart muscle has roughly 5,000 mitochondria. Since these cells require more energy than any other organ in the body, they have more mitochondria than any other organ!

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Lysosomes function in the destruction and recycling of old organelles. This statement is TRUE.

What are Lysosomes?

Animal cells have membrane-bound organelles called lysosomes. Though there is considerable disagreement on the subject, it is believed that some plant cells include lysosomes. They have a single phospholipid bilayer–containing outer membrane. The hydrophilic half of the phospholipid bilayer adores water, whereas the hydrophobic half avoids it. The membrane is made up of acids and enzymes that can break down and digest macromolecules. Nucleic acids, artificial polymers, and proteins are examples of macromolecules, which are molecules containing a huge number of atoms.

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Answer:

The greenhouse effect is caused by the atmospheric accumulation of gases such as carbon dioxide and methane, which contain some of the heat emitted from Earth's surface. ... This radiation, unlike visible light, tends to be absorbed by the greenhouse gases in the atmosphere, raising its temperature

Explanation:

Answer: Infrared light cannot transmit through the atmosphere

The difference in effective population sizes is a likely contributor to the lower proportions of coding DNA in eukaryotes compared to prokaryotes.

The reason behind the pattern of eukaryotes having lower proportions of coding DNA compared to prokaryotes is that eukaryotes have smaller effective population sizes than prokaryotes.

In general, smaller population sizes lead to less genetic variation and less selective pressure for efficient use of DNA. This means that eukaryotes can have more non-coding DNA without it negatively impacting their fitness. On the other hand, prokaryotes have larger population sizes and therefore experience stronger selective pressure to use their DNA efficiently. As a result, prokaryotes tend to have higher proportions of coding DNA in order to maximize the production of necessary proteins.

It is important to note that this is just one possible explanation for the observed pattern. Other factors, such as differences in mutation rates or protein requirements, could also play a role. However, the difference in effective population sizes is a likely contributor to the lower proportions of coding DNA in eukaryotes compared to prokaryotes.

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Answer:

Antigen

Explanation:

on the surface of the pathogen that helps immune cells identify then

When pathogen are swallowed by the immune system's macrophages and dendritic cells, they are digested and a small amount of the pathogen's antigen is attached to the macrophage's surface.

What is antigen?

Any chemical that triggers the body's immune system to react negatively to it. Toxins, chemicals, germs, viruses, and other things originating from the outside of the body are examples of antigens.

In reaction to exposure to antigens, B cells of the immune system create Y-shaped proteins known as antibodies (immunoglobulins).

Antigen receptors, such as antibodies and T-cell receptors, are responsible for recognizing antigens.

Immune system cells produce a variety of antigen receptors, giving each cell a specificity for a single antigen.

Therefore, antigen is attached to the surface of the macrophage.

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There are 22 bones in the skull, as well as a ton of cartilage and ligaments. All of the skull's other bones, excluding the mandible, are fused together.

The majority of adult specimens have 22 bones in the skull, which are connected by cranial sutures. The skull serves a structurally supporting and protective purpose. The cerebrum, cerebellum, brainstem, and orbits are the interior contents of the skull that will harden and fuse during development to preserve them.

The skull's bones can be split into two primary groups:

There are 14 facial skeletal bones and 8 cranial bones.

The list of neurocranial bones is as follows: Ethmoid -1, Frontal -1, Occipital -1, Parietal -2, Sphenoid-1, Temporal -2

The list of facial skeleton bones is as follows:

Inferior nasal concha -2, Lacrimal -2, Mandible -1, Maxilla -2, Nasal -2, Platine -2, Vomer -1, Zygomatic -2

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The structure that is highlighted in the given diagram is infraspinous fossa.

The infraspinous fossa is a large concave region located on the posterior (back) surface of the scapula (shoulder blade). It is one of the two major fossae (depressions) found on the scapula, the other being the supraspinous fossa. The infraspinous fossa is positioned below the scapular spine and is bounded by the medial (inner) border and the posterior (back) border of the scapula.

The infraspinous fossa serves as an attachment site for the infraspinatus muscle, one of the muscles that make up the rotator cuff of the shoulder joint. This muscle plays a key role in shoulder movement and stabilization. The size and depth of the infraspinous fossa allow for the proper functioning and range of motion of the infraspinatus muscle.

In summary, the infraspinous fossa is a concave region on the posterior surface of the scapula that provides an attachment site for the infraspinatus muscle and contributes to shoulder movement and stability.

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the complete question is:

what structure is highlighted? infraspinous fossa supraspinous fossa medial border of scapula scapula spine of scapula

Answer:

Explanation:

In anaerobic respiration, the end-products are ethanol and carbon dioxide in plants whereas the end-products are lactic acid only in animals. Thus, the anaerobic respiration in plants is associated with evolution of carbon dioxide as in aerobic respiration, though it occurs in the absence of oxygen but no carbon dioxide is evolved in anaerobic respiration in animals.

Answer:

Explanation:

Let the points be A and B

A ( -2 , 3 ) ⇒( x₁ , y₁ )

B ( 1 , -3 )⇒( x₂ , y₂ )

Now, let's find the slope:

Slope = \( \sf{\frac{y2 - y1}{x2 - x1} }\)

plug the values

⇒\( \sf{ \frac{ - 3 - 3}{1 - ( - 2)} }\)

When there is a ( - ) in front of an expression in parentheses , change the sign of each term in the expression

⇒\( \sf{ \frac{ - 3 - 3}{1 + 2} }\)

Calculate

⇒\( \sf{ \frac{ - 6}{3} }\)

⇒\( \sf{ - 2}\)

Hope I helped!

Best regards!!

Answer:

m = -2

Explanation:

Step 1: Use slope formula to find slope

\(m=\frac{y2-y1}{x2-x1} =\frac{-3-3}{1-(-2)}= \frac{-6}{3} =-2\)

Therefore the slope of the line is -2

Therefore the slope is -2

Answer:

catepillars are plastivores because they eat plastic

Explanation:

I could try help, what is the answer you are looking for?