Which is a carbohydrate?

amino acid

nucleic acid

nucleotide

polysaccharide

Describe the levels of organization from cells to organs.

Place the following events in sequence: A) Runoff from farms enters a pond; B) Methane and hydrogen sulfide are released; C) Anaerobic bacteria begin to thrive C, B, A A, C, B C, A, B A, B, C

All animals are: consumers carnivores scavengers omnivores

Neurons are highly specialized cells that have lost the ability to divide. what phase are neurons in?

Which of the following is a possible function of a protein?

Games like tag and hide and seek are examples of: A: Constructive play B: Fantasy play C: Creative play D: Motor play E: Parallel play

Explain in a complete sentence why it is important for scientists to share information with one another.

The DNA message depends on the order of the a. nitrogen bases. b. acids. c. sugars. d. genes.

How to tell if a fossil is older

Males have only one copy of each type of sex chromosome; therefore, all sex-linked genes are expressed, even recessive alleles. Based on this information, which statement is true? A.