Q: What occurs when spores from two parents fuse and form a zygospore? Choices: - twins - asexual reproduction - internal reproduction - sexual reproduction A:
sexual reproduction

Q: Which type of arthritis causes the immune system to attack joints? Choices: - Osteoarthritis - Gout - Spondylarthropathies - rheumatoid A:
rheumatoid

Q: Q: In prokaryotes, what are the regions called that repressors bind to? Choices: - elements - enablers - consumers - operators A:
A: operators

Question: Q: What type of waves start when a source of energy causes a disturbance in the medium? Choices: - fluid waves - mechanical currents - magnetic waves - mechanical waves A:
Answer: mechanical waves

*Question*
Q: What is the name for the stratospheric gas layer that protects living things from uv radiation? Choices: - carbon layer - atmospheric layer - toposphere - ozone layer A:
**Answer**
ozone layer

(Q).
Q: Very large stars eventually become what extremely dense space regions, which are so dense that no light can escape from them? Choices: - worm holes - dark matter - moons - black holes A:
(A).
black holes