What do you call substances that change the chemical structure of dna

1. Nervous systems are required by animals to respond to stimuli and have complex senses such as taste, touch, sight, smell, or sound. These are carried by nerves to and from the brain and spinal cord.

What is the brain's response to stimuli that is too cold Adjusting pH Shivering Releasing water All of above

Which stem cells are capable of the most limited differentiation? A.) adult stem cells B.) amniotic fluid stem cells C.) embryonic stem cells D.) somatic stem cells

What layer of the earth is moving during an earthquake? Core Mantle plates Lithospheric plates Mesopheric plates

Evidence has been found that shows that primate ancestors developed the ability to see color. Previously, like most mammals, they could only see shapes using light and shadow.

How does skin prevent entry of micro organism in the body

Hank likes to explore nearby streams during the summer. However, one winter there is a lot of rain near the stream. How might the stream change before the next summer? A. The stream will have dried up. B. The stream water will be shallower. C.

A woman with rheumatoid arthritis has taken leflunomide for 1 year. she telephones a nurse and says that the result of a home pregnancy test was positive. the nurse should:

Which of Mendel's laws or principles states that gametes carry one allele for each trait?

What is not a name for a chain of amino acids