Q: What do you call a substance that cannot be broken down to other substances by chemical reactions.? Choices: - a participate - a molecule - a compound - an element A:
an element

Q: When does the diploid zygote form? Choices: - never - before the pollen tube - before the haploid zygote - after the pollen tube A:
after the pollen tube

Q: Q: Endoscopes are used to explore the body through various orifices or these? Choices: - dermal tears - major incisions - ocular cavity - minor incisions A:
A: minor incisions

Question: Q: The hormones epinephrine and norepinephrine are released by what? Choices: - uptake medulla - nutrients medulla - external medulla - adrenal medulla A:
Answer: adrenal medulla

*Question*
Q: What is the process that allows organisms with better traits to survive and produce? Choices: - spontaneous mutation - adaptation - succession - natural selection A:
**Answer**
natural selection

(Q).
Q: What lengths are positive for converging lens and negative for diverging lens? Choices: - light lengths - wavelengths - differential lengths - focal lengths A:
(A).
focal lengths