Q: What makes toenails and fingernails hard? Choices: - guanine - cellulose - taurine - keratin A:
keratin

(Question)
Q: A genetic molecule is called dna, which stands for this? Choices: - di-nitrous ammonia - dark nitrogen amine - dense ribonucleic acid - deoxyribonucleic acid A:
(Answer)
deoxyribonucleic acid

Ques: Q: Parasitic fungi often cause illness and may eventually do what to their hosts? Choices: - reproduce with them - mutate them - become them - kill them A:
Ans: kill them

(Q).
Q: How do reptiles typically reproduce? Choices: - cloning - live birth - asexually - sexually A:
(A).
sexually

Ques:Q: The sun's energy is converted to chemical energy by a what? Choices: - bacterium - mammal - amphibian - plant A:

Ans:plant

Q: What is a push or a pull acting on an object? Choices: - pulse - energy - action - force A:
force