To which part of the DNA nucleotide do the letters A, T, C, and G refer?

A. The phosphate group

B. The nitrogen base

C. The deoxyribose

D. The amino acid group

Which type of tissue is found lining the esophagus? connective epithelial muscle nervous

Categorize each relationship as mutualism or parasitism

What are the 8 characteristics of ALL life?

Why do some human traits, such as height and hair color, show a large number of phenotypes?

Which of the following pairs of reproductive organs serve similar functions? A. urethra - uterus B. testicles - ovaries c. penis - Fallopian tube D. prostate gland - vagina

Which is a function of genes found in organisms

explain why and organisms my role is important for a community

Abiogenesis refers to how living organisms arose from inanimate matter. Place the sentences in order according to how life on Earth may have arisen from terrestrial origins. Only four sentences will be used.

An over-response of the body to a specific substance is called

The thymus functions strictly in maturation of t cells. the thymus functions strictly in maturation of t cells. a. True b. False