A geologist studies rocks and such
With shorter necks, giraffe ancestors could not reach food-containing branches on tall trees. This resulted in the directional selection of giraffes with longer necks.
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Why is choosing a direction necessary? </h3>
It nearly appears obvious that the giraffe's long neck developed as a result of a lack of food in the lower branches of trees. The giraffe has a significant advantage because it is taller than any other mammal and can feed where few others can.
When compared to modern giraffes, the giraffe's ancient predecessors had a shorter neck. The plants that were lying at a higher level were inaccessible to them. Giraffe phenotypes have changed in various ways, and now have long necks to reach vegetation that is higher up. The extreme form is chosen above other features in directional selection. It was decided to choose the long-necked giraffe over the short-necked.
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Answer:
First, the activity that humans execute that affects their ecosystem positively is reforestation. Second, the activity that humans execute that affects their ecosystem positively is hunting. Their effects rely completely in nature, however, one improves the ecosystem by making it greener and increasing the space nature has to grow, while the other impacts the ecosystem negatively by unbalancing the food chain.
Explanation:
The reasons behind this answer are that in the first place the ecosystem is a very sensitive environment that can be affected by a wide range of factors. In the first place, reforestation helps the environment have better conditions for the animals that live in it, as well as to provide the human race a better quality of air, water and feel better after living in a more natural ecosystem. While hunting breaks the ecosystem's balance because it allows the food chain of the ecosystem to break and allow a general modification.
The correct answer is option C, that is, saves species from extinction.
The Endangered Species Act is one of the most essential and efficient environmental laws of America. It signifies a willingness by the people of America to work in harmony and restore and protect the species most vulnerable of getting disappeared forever.
The act offers common sense, balanced solutions for the landowners, government agencies, and concerned citizens to preserve the endangered wildlife and their habitats. It includes three prime elements:
1. Inhibiting the listed species from getting harmed or killed
2. Developing plans to restore healthy populations
3. Safeguarding habitat important to these species survival.
Answer:
Antibiotics cannot kill viruses because bacteria and viruses have different methods to survive and replicate. Viruses replicate via inserting their DNA into a host cell.
Explanation:
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