Q: What events, resulting in death of over half of animal species, have occurred on earth at least five times in the past 540 million years? Choices: - mass migrations - microevolutions - spontaneous mutations - mass extinctions A:
mass extinctions

Q: What type of fish are the majority of living species? Choices: - cartilaginous fish - freshwater fish - lungfish - ray-finned fish A:
ray-finned fish

Q: Q: What makes metals shiny? Choices: - light characterization - light energy - light expansion - light reflection A:
A: light reflection

Question: Q: The values of which factors are controlled by the experimenter over the course of an experiment? Choices: - other variables - independent elements - independent approaches - independent variables A:
Answer: independent variables

*Question*
Q: Has this ever happened to you? you walk across a carpet, reach out to touch a metal doorknob, and get an unpleasant electric shock? .the reason you get a shock is because of what? Choices: - sunlight charge - temperature charge - solar charge - electrical charge A:
**Answer**
electrical charge

(Q).
Q: In some plants, the sporophyte is diploid, while the gametophyte is what? Choices: - gametes - humanoid - meiosis - haploid A:
(A).
haploid