Q: What is the name of the muscular tube that carries urine out of the body? Choices: - rectum - uterus - bladder - urethra A:
urethra

Q: What is it called when liquid water falls from the sky? Choices: - sedimentation - water cycling - erosion - precipitation A:
precipitation

Q: Q: Hydrocarbons in which all carbons are connected by single bonds are called? Choices: - acids - enzymes - lipids - alkanes A:
A: alkanes

Question: Q: Invertebrates make up what percentage of all animal species? Choices: - 90 percent - 50 percent - 30 percent - 95 percent A:
Answer: 95 percent

*Question*
Q: Solar cells turn sunlight directly into what? Choices: - gas - water - cold - electricity A:
**Answer**
electricity

(Q).
Q: Humans have about 20,000 to 22,000 genes scattered among 23 of these? Choices: - neutrons - ribosomes - atoms - chromosomes A:
(A).
chromosomes