Q: The smallest part of an element that maintains the identity of that element is called what? Choices: - lattice - nucleus - neutron - atom A:
atom

(Question)
Q: Nitrogen wastes are produced by the breakdown of what during normal metabolism? Choices: - enzymes - hormones - lipids - proteins A:
(Answer)
proteins

Ques: Q: Where do ectotherms get most of their heat? Choices: - food - metabolism - internally - external sources A:
Ans: external sources

(Q).
Q: Which hormones work together to control the level of glucose in the blood? Choices: - insulin and estrogen - serotonin and glucagon - testosterone and insulin - insulin and glucagon A:
(A).
insulin and glucagon

Ques:Q: Give an example of a ball-and-socket joint, which has the greatest range of motion, allowing movement in several directions. Choices: - pulley - lever - monkey wrench - shoulder A:

Ans:shoulder

Ques:Q: Hiv is a retrovirus, which means it reverse transcribes its rna genome into what? Choices: - atp - ribosomes - amino acid chains - dna A:

Ans:
dna