Answer:
Genetic Mutations
Explanation:
Whenever there is a genetic mutation (point, frame shift,...) our DNA is altered. Over billions of years, there is the potential of having mutated DNA passed down from generations, adding their own mutation, causing diversity in the gene pool, ultimately changing the genetic code of species throughout the years.
Answer:
Explanation:
Ecosystems maintain themselves by cycling energy and nutrients obtained from external sources. ... The low rate of energy transfer between trophic levels makes decomposers generally more important than producers in terms of energy flow.
The "GM" here refers to "genetically modified" plants - they are modified by food engineers to better suit our wishes.
One benefit of those plants is that those plants would be better for humans: for example they would have sweeter flesh or less seeds (this is something that happened to watermelon through the selection of best watermelons throughout the centuries).
Answer:
1.—The (more) variations in forms it can produce.
2.—Biologists often need to search for evidence (in the distant past).
3.—By revealing the forms of (extinct species).
4.— (Intermediate) fossils can help biologists.....
Answer:
True.
Explanation:
Fight or Flight response are mainly generated at the time of anger, fear and stress. The sympathetic nervous system of the brain manages the body at the time of natural stress.
The individual to perform well in the high pressure situation is suffering from the natural stress. The response of the body is to release extra hormones to manage this situation.
Thus, the answer is option (a).
