DNA Mutation is caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. Thus, the correct answer is option D.
1.DNA Mutations are caused by environmental factors known as mutagens.
2.Types of DNA mutagens include radiation, chemicals, and infectious agents.
3.DNA Mutations may be spontaneous in nature.
Elephants, who are important grazers, are instrumental in transforming woodlands into grasslands. This has a tremendous impact on other species that depend on the grass for their survival. The significance of the elephant in this example is B. keystone species.
Answer:
Parasympathetic nervous division
Explanation:
The parasympathetic division of nerves is a part of the autonomic nervous system which gets activated during the relax conditions.
The parasympathetic nervous system is the opposite of the sympathetic nervous system which gets activated during the stress condition.
The parasympathetic division gets activated when the level of cortisol and adrenaline gets decreased and the body responds by detoxifying, digesting and building immunity.
Thus, Parasympathetic nervous division is the correct answer.
When guard cells lose potassium ions, water diffuses out of the cells by osmosis. As water leaves the cells, they become flaccid and less bowed, which closes the stomata between them.
Answer:
they use light energy to make food for the plant
Explanation:
This organelle is where light is taken and transformed into chemical energy and food.
