Which statement best describes the role of animals in the water and carbon cycles?
animals release carbon dioxide and water vapor as a by-product of cellular respiration.

animals release carbon dioxide and water vapor as a by-product of photosynthesis.

animals take in carbon dioxide and oxygen during cellular respiration.

animals use oxygen to perform photosynthesis and release carbon dioxide as a by-product.

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.