. Students decide to remove the litter from an abandoned park and plant trees. Which of the following observations provides the best evidence that the action of the students has had a positive effect on the health of the park ecosystem?
A. The number of human visitors decreases.
B.The level of yearly precipitation increases.
C.The number and diversity of animals increases.
D.The average daily high temperature decreases.
Answers
Answer:
c
Explanation:
Related Questions
Deposited sediment may be in particles of which type of rock
Answers
Deposited sediment may be in particles of sedimentary rock.
Pre-existing rocks or fragments of extinct species serve as the building blocks for sedimentary rocks. They develop from deposits that build up on the surface of the Earth. Sedimentary rocks frequently exhibit recognizable bedding or layering. Mesas and arches built of stratified sedimentary rock can be seen in many of the desert southwest's attractive landscapes.
You can divide sedimentary rocks into two groups. The first type is called detrital rock and is created when sediment, rock fragments, or other elements are eroded and accumulated; these materials are collectively known as detritus or waste. The other type of rock is chemical rock, which is created when minerals dissolve and then precipitate.
It's possible for detritus to be organic or inorganic. When plant and animal components decompose below, the biological material is left behind that is crushed and transformed into organic detrital rocks. The sedimentary rock known as coal was created by compacted plants over millions of years. On the other hand, inorganic detrital rocks are not generated by living creatures but rather by the fragmentation of other rocks. Clastic sedimentary rocks are another name for these rocks. One of the most well-known clastic rocks is sandstone.
Limestone and shale are some of the other examples of common sedimentary rocks. These rocks frequently begin as sediments that are transported by rivers, and then are dumped in lakes and oceans. The sediments become dry and cement together to form rock when they are buried. Volcanic ash can be found in tuffaceous sandstones.
Chemical sedimentary rocks can be found in a variety of environments, including caverns, deserts, and the ocean. For instance, calcium carbonate precipitation and the remains of shelled marine organisms are two of the key ingredients in the formation of limestone at the ocean's bottom. If limestone is discovered on land, it is likely that the region was once submerged.
Although cave formations are likewise made of sedimentary rocks, their formation is substantially different. When water travels through bedrock and picks up calcium and carbonate ions, stalactites and stalagmites are formed. When the chemical-rich water enters a cave, it evaporates and deposits calcium carbonate on the cave's ceiling or floor, where it forms stalactites and stalagmites.
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Half the trees of a small forest become infected with the western pine bark beetle. Which of the following is the best solution to save the forest?
Burning infected trees
Clearcutting
Prescribed burn
Integrated pest management
Answers
Answer:
integrated pest management
Explanation:
la energía fotovoltaica emite gases de efecto invernadero?
Answers
Answer:
La energía solar fotovoltaica no emite gases tóxicos ni contaminantes, no produce residuos ni tampoco contamina el agua, por lo que su utilización para generar electricidad contribuye de forma efectiva para reducir el calentamiento global.
On a food pyramid, where is the most energy for the ecosystem?
A. In the middle with the omnivores.
B. Near the bottom with the herbivores.
C. At the top with the top carnivores.
D. At the bottom with the producers.
Answers
Option D is the most energy for the eco system. The producers are located in the base of the pyramid, which is also its greatest level.
The amount of energy declines and the levels get smaller as you climb the pyramid to reach primary, secondary, and tertiary consumers through the trophic levels.
Producers are organisms like plants, algae, and some bacteria that operate as the main energy source by converting light or chemical energy into food like glucose. Producers play a significant part in every ecosystem. Both directly and indirectly, they are necessary for both herbivores and carnivores.
As a result, Option c's producers—organisms like algae and green plants that can manufacture their own food using the energy of the sun—would be the source of the greatest energy in an ecosystem.
The food chain's top trophic level contains the greatest energy. The producers, which include all photosynthetic creatures, are found at this level. Moreover, occasionally photosynthetic bacteria and protists are included in this. These organisms convert solar energy into organic sugar by using it.
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A farmer is analyzing cross sections of his land to determine where to build a well.
Which phrase describes the best area to dig down to the groundwater?
where the saturated zone is 15 meters deep
where the water table is at 100 meters deep
where the unsaturated zone is 50 meters thick
where there is a 25-meter thick clay layer at the surface
Answers
Where the water table is 100 metres below the surface is the best place to look for groundwater.
How far down must she dig to get to the water table?Answer: Five feet is the right response. The top layer of porous material is referred to as the unsaturated zone; this is the layer that is rarely filled with water unless it has recently rained.
Which will make groundwater accessible to people?Aquifers are the source of the majority of groundwater, including a sizeable portion of our drinking water. A well must be made by boring a hole that extends to the aquifer in order to get this water. Aquifers can discharge naturally at springs and in wetlands in addition to at man-made locations like wells.
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Answer:
B
Explanation:
Foreign proteins that gain access to the body through cuts and scrapes, through the digestive or circulatory systems, or through the urinary and reproductive systems are called ____.
1. mineralocorticoids
2. immunoglobulins
3. antigens
4. antibodies
Answers
Discuss the role of proteins in membrane structure and transport of molecules across the membrane?
Answers
The role of proteins in membrane structure and transport of molecules
across the membrane include the production of hydrophilic pores to aid
movement of molecules into the cell.
Proteins are organic substances found in cells which produce pores which
have a high affinity to water thereby allowing other important molecules
enter into the cell.
It is a very important feature of the cell membrane as it ensures there are
enough nutrient needed by the cell to prevent starvation and death.
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Two dogs mate and produce a the same breed puppy. This is an example of___.
Answers
Answer:
are you talking about cross breed?
How does this affect the change?
Answers
Answer: B. It sped up evolutionary change by increasing genetic variation.
Explanation:
Evolution works when organisms with genes that are better suited to the environment pass on their genes to future generations.
Sexual reproduction sped up this process because it allowed for genetic variation as genes from the two mates would be passed on the next generation instead of one organism as had been the case with asexual production.
With genes from both mates mixing up and going into the next generation, more genetic variations were produced which allowed for the organisms to better adapt to the environment.
What is a tree that produces cones called?
Answers
Answer:
Gymnosperms
Explanation:
Plants w/ cones
write some differences between unisexual and bisexual organisms
Answers
Answer:
Unisexual and bisexual organisms are differentiated based on the reproductive systems they posses. Unisexual organisms have separate sexes male or female. Male and female reproductive systems are present in different individuals hence unisexual organisms produce male or female gametes but never both. Bisexual organisms have both male and female reproductive systems within the same individual. Hence, they are capable of producing both types of gametes. Some flowers are unisexual, and they possess only pistils or stamens. Some flowers are bisexual, and they possess both stamens and pistils together. This is the difference between unisexual and bisexual organisms.
explain 4 reason for studying genetic
Answers
Answer
The 4 reasons for studying genetic are?
Explanation:
1. Genetics are what make you unique, there what separate you from everybody else in the world. 2. They help scientists study why each members in a family that have the same genetics look the same or show a resemblance. 3. Genetics also help scientists discover what diseases run in your family and where the disease came from in your family. 4. Genetics are also a good way to find out similarities and differences that can help improve how human genes function and are controlled.
The populations of predators and prey tend to stabilize over time. What will
most likely happen if the population of a prey species decreases?
OA. The prey population will increase quickly.
OB. The predator population will increase.
OC. The predator population will maintain its original size.
OD. The predator population will decrease.
SUBMIT
Answers
Answer:
D. The predator population will decrease.
Explanation:
If there is less prey, the food source for predators decreases therefore shortening the lifespan of some predators.
Which option describes a step in designing an experimental investigation? O A. Identifying the variables that will be controlled for all experimental groups B. Writing a procedure that prevents other scientists from repeating the results C. Making sure that the hypothesis will be supported and not refuted O D. Collecting each piece of data in a different way so that there is more variety
Answers
A step in designing an experimental investigation is identifying the variables that will be controlled for all experimental groups.
The correct option to the given question is option A.
An experiment is a controlled investigation where scientists manipulate and measure specific variables. Scientists design experiments to test hypotheses and answer questions. In the design of an experiment, several steps must be followed to ensure the results are accurate and reliable.
Identifying the variables that will be controlled for all experimental groups: This is an essential step in designing an experimental investigation. Controlled variables are variables that scientists keep constant throughout the experiment so that they do not influence the dependent variable.Writing a procedure that prevents other scientists from repeating the results: Scientists usually provide a detailed description of their experimental procedures to ensure that other scientists can reproduce the results of the experiment and verify its accuracy.
Making sure that the hypothesis will be supported and not refuted: A hypothesis is a statement that scientists make that explains the relationship between the variables in an experiment. The hypothesis must be tested to determine whether it is supported or refuted.Collecting each piece of data in a different way so that there is more variety: In an experiment, data is collected to support or refute the hypothesis. Scientists should collect data in different ways to ensure that the results are reliable and accurate.
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PRBERY, YTRABSEWRR, CERHRY
Answers
Answer: 1.? 2. strawberry 3. Cherry Have a great day or night :)
Explanation:
Vitamins C and E protect the cell membrane from damage by
Answers
Answer:
Lipid soluble Vitamin E prevents lipid peroxidation chain reactions in cellular membranes by interfering with the propagation of lipid radicals. Vitamin C is a water-soluble antioxidant found in the cytosol and extracellular fluid that can interact directly with free radicals, thus preventing oxidative damage.
Explanation:
As an antioxidant, vitamin C prevents oxidative stress-related cellular damage by scavenging reactive oxygen species, neutralizing lipid hydroperoxyl radicals in dependence on vitamin E, and shielding proteins from electrophilic lipid peroxidation products that can cause alkylation.
What are vitamins?Vitamins are defined as a collection of molecules required for healthy cell growth, development, and function. Vitamins and minerals help good cell and organ function, healthy growth and development, and a strong immune system. Vitamin D is the most crucial vitamin for your body overall due to its participation in numerous bodily processes and the astounding number of people who are deficient in it.
The main line of defense against potentially hazardous oxidation reactions is vitamin E. Ascorbic acid (vitamin C) is one of the other necessary nutrients, along with vitamin E, that contributes to the antioxidant defense system by preventing lipid peroxidation.
Thus, as an antioxidant, vitamin C prevents oxidative stress-related cellular damage by scavenging reactive oxygen species, neutralizing lipid hydroperoxyl radicals in dependence on vitamin E, and shielding proteins from electrophilic lipid peroxidation products that can cause alkylation.
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When testing tonicity of red blood cells, if the solution became opaque after adding blood cells, you could assume
Answers
Answer:
The solution was hypertonic and that the cells had burst.
Explanation:
When testing tonicity of red blood cells, if the solution became transparent after adding blood cells, you could assume the solution was hypotonic and the cells had burst.
Tonicity of the red blood cells is the degree or measure of the red blood cells ability to change the volume of a cell by alternating water amount.From the above we can therefore say that the answer When testing tonicity of red blood cells, if the solution became transparent after adding blood cells, you could assume the solution was hypotonic and the cells had burst is correct
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What event accompanies energy absorption by chlorophyll (or other pigment molecules) of the photosystems
Answers
Answer:
an electron is exited
Explanation:
as the electrons are released into the system of electron carriers involved with photosystem two, they lose their energy
Lesson 13 Review Questions Directions: Answer each of the following questions. 1. List five traits that are shared by all mammals, including the two traits that are used to define the mammal class. 2. Describe how mammals stay warm. 3. What is the function of sweating? 4. What are alveoli? What is their function? 5. What are the functions of the uterus and vagina in therian mammals? 6. What is the placenta? What is its role? 7. Where does a marsupial embryo develop? How is it nourished? 8. Describe eggs and egg laying in monotremes. 9. How does lactation differ in monotremes and therian mammals? 10. What were the synapsids? When were they most widespread? 11. Identify the therapsids. How were they related to mammals? 12. Outline the evolution of monotreme, marsupial, and placental mammals.
Answers
They are one of the three groups of living mammals, along with placentals and marsupials..
What human trait is shared by all mammals?All mammals (including humans) have the same distinctive features. These include: fur or hair growing from the skin. mammary glands that, in females, produce milk for feeding the young.Mammals conserve body heat with their hair or fur. It traps a layer of warm air next to the skin.Mammals and birds produce their own body heat and control their body temperatures. This process is known as endothermy, or warm-bloodedness, and it may be one of the reasons why mammals tend to dominate almost every global ecosystem.Its main function is to control body temperature. As the water in the sweat evaporates, the surface of the skin cools. An additional function of sweat is to help with gripping, by slightly moistening the palms.Muscular contractions of the uterus push the offspring out during birth. The vagina is a tubular passageway through which the embryo or fetus leaves the mother's body.Marsupials give birth to a tiny, immature embryo. The embryo then continues to grow and develop in a pouch on the mother's belly. Marsupial development is less risky for the mother. However, the embryo is fragile, so it may be less likely to survive than the fetus of a placental mammal.To learn more about mammals refer to:
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What is the main use of freshwater worldwide?
A.Residential uses,such as bathing and cooking
B.Recreational uses,such as boating and swimming
C.Industrial uses,such as manufacturing
D.Agricultural uses such as watering crops
Answers
The main use of freshwater worldwide is the agricultural uses such as watering crops. Thus, the correct option is D.
What is freshwater?Freshwater is the water which contains only minimal quantities of dissolved salts and minerals, thus distinguishing it from that of sea water or brackish water. All the freshwater ultimately comes from precipitation of atmospheric water vapor, reaching the inland lakes, rivers, and groundwater bodies directly, or after the melting of snow or ice.
Healthy freshwater environments are the main water supply for drinking, growing crops, manufacturing, energy, and transport purpose. They also help to prevent erosion, dispose of waste material and provide natural protection against flooding.
Therefore, the correct option is D.
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Some of the largest mountains in the world, including the Himalayas, occur where
Select one:
a.
two oceanic plates diverge.
b.
two continental plates converge.
c.
an oceanic and a continental plate diverge.
d.
an oceanic and a continental plate converge.
Answers
Answer:
b. two continental plates converse
Which of the following is a likely consequence of the thinning of the ozone layer?
a. Increase in lethal and nonlethal skin cancers.
b. Increase in the escape of heat from the Earth.
c. Global warming.
d. Elimination of flying insects.
Answers
name 3 kinds fossil fuel
Answers
Answer:
Coal, oil, and natural gas.
Explanation:
Hope this helps!
Answer:
3 kind of gas: coal, petroleum, natural gas
Explanation:
A biologist is studying how green sea turtles choose where to lay their eggs. She makes a hypothesis that because this species is related to other sea turtles through common ancestry, they probably all use the same process. This biologist formed her hypothesis using:________
a. A hunch
b. The unifying theory of evolution
c. Experimentation
d. The scientific method
e. Observations of green sea turtles' behavior
Answers
Answer:
Option b
Explanation:
Hypotheses are carried out as proposed explanation made on the basis of limited evidence which serves as a beginning point for further study.
The biologist in this case has a limited evidence with regards to this species which is just only about its ancestry, so her hypothesis was based on the unifying theory of evolution which is the framework within which biologists ask questions about the living world providing predictions with regards to directions about living things.
The correct answer, unequivocally, is (B).
- This is because she used her knowledge that, from an standpoint of evolution, these turtles were related to each other.
If a food has many calories relative to its physical size, it's considered to have a
A. high calorie density.
B. low calorie density.
C. high fat density.
D. low fat density.
Answers
Answer:A
Explanation: High-calorie density per its physical size
Answer:
A is the answer because it is high in calories density
Nitrogen makes up most of the Earth's atmosphere in the form of N2, a gas that does not easily undergo chemical reactions. What would ultimately happen if nitrogen stayed in the form of N2 and did not leave the atmosphere?
A.
Animals would run out of food.
B.
All life on Earth could end.
C.
Plants would eventually stop growing.
D.
all of these
Answers
Answer:
it must be denitrified.
Explanation:
Decomposition makes the nitrogen available to go through nitrification again. For nitrogen to return to the atmosphere in its gaseous N2 form,
the decline of mpf activity at the end of mitosis is due to the decline of mpf activity at the end of mitosis is due to the degradation of cyclin. the destruction of the protein kinase cdk. synthesis of dna. the accumulation of cyclin. decreased synthesis of cdk. request answer
Answers
Kinase and cyclin make up MPF. It permits the cell to pass from the G2 to the M stage. MPF deactivates as a cell enters anaphase.
The breakdown of the kinase activity is what results in the decrease in MPF activity towards the conclusion of mitosis (Cdk). The consists of five phases complicated (Associated protein), a binding protein that starts the destruction of M cyclins in anaphase, is activated by MPF, which not only drives the events of Metaphase 1 but also sets off its own demise. Cdk (cyclin kinase, which adds phosphorus to a protein) and cyclins are two key cell cycle regulatory molecules that direct the cell to transition from G1 into S and G2 to M. The MPF (Ripening Promoting Factor) that starts the cell cycle moving forward contains cyclins and CdK. The MPF would remain active if the cyclin was not degraded. Consequently, the cell would experience constant pressure to migrate.
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When the amount of the lighted surface of the Moon that is visible from Earth is decreasing, the Moon is
Answers
Answer:
Waning
Explanation:
Or more precisely Waning Gibbous
Should we devote time and money to developing alternative energy resources? Why or why not?
Answers
Explanation:
Planet Earth has limiting resources. However, the rate at which these resources are being consumed in present time, will eventually lead to a situation where enough resources will not be available for the future generation.
In order to move ahead with agenda of sustainable growth, it is very essential to invest in alternative energy sources.
Also the alternative energy resources will be used for green energy generation without any pollution.
Hence, devoting time and money to developing alternative energy resources will not only preserve essential natural resources but also reduce the cost incurred due to pollution and environmental degradation.
Some common alternative energy resources are - Solar, wind energy, bio diesel etc.
In his arguments, the rancher focuses only on his family. In what way is this technique effective? Could his arguments benefit from additional information? If so, what kinds of information?
Answers
This technique is effective because by doing so, he draws attention to his issue and makes it easier for others to relate to the rancher's family's predicament.
Arguments where the rancher just focuses on his family can be successful because he attracts attention to his issue and makes it easier for others to relate to the rancher's struggling family. People can identify with others more readily when the discussions are more intimate.
In the movie The Rancher, a physically and emotionally traumatized man comes back to claim the ranch he inherited from a father who hated him. By the time he was sixteen, he hated him so much that he drove him off his land. But when he got back, he discovered friends and family, even if they had to drag him into the group against his will.
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