Q: Hair and nails are made of what? Choices: - chromatin - proteins - cellulose - keratin A:
keratin

Q: What do earth and the other planets in the solar system make around the sun? Choices: - radial orbits - smooth orbits - elevated orbits - elliptical orbits A:
elliptical orbits

Q: Q: What encloses the genetic material of the virus? Choices: - mitochondria - nuclei - the spindle - the capsid A:
A: the capsid

Question: Q: Three distinct layers or tunics form the walls of what structures; the first is a smooth, inner lining of endothelial cells in contact with the red blood cells? Choices: - lungs - white blood cells - alveoli - blood vessels A:
Answer: blood vessels

*Question*
Q: In which phase do the sister chromatids separate? Choices: - prophase - passivation - latent phase - anaphase A:
**Answer**
anaphase

(Q).
Q: What is one function of the nervous system in humans? Choices: - controlling emotion - producing hormones - controlling thought - controlling muscles A:
(A).
controlling muscles