Q: What type of reproduction usually occur during times of environmental stress? Choices: - internal reproduction - hysterical reproduction - asexual reproduction - sexual reproduction A:
sexual reproduction

(Question)
Q: What do you call a period when temperatures are cooler than normal, causing glaciers to spread? Choices: - polar age - earth age - thermal age - ice age A:
(Answer)
ice age

Ques: Q: How many hydrogen atoms does a nitrogen atom of a primary amine have? Choices: - four - six - ten - two A:
Ans: two

(Q).
Q: The german physicist max planck (18581947) used the idea that atoms and molecules in a body act like oscillators to absorb and emit this? Choices: - blood - energy - convection - radiation A:
(A).
radiation

Ques:Q: What is the term for a technique used to separate out homogeneous mixtures in which one or more solids are dissolved in a liquid? Choices: - transpiration - absorption - distillation - evaporation A:

Ans:evaporation

Q: The rate of dissolving is influenced by surface area, stirring, and what else? Choices: - oxygen - density - gravity - temperature A:
temperature