Q: One of the simplest machines is the lever, which is a rigid bar pivoted at a fixed place called what? Choices: - caliper - sling - wheel - fulcrum A:
fulcrum

Q: In drosophila, gradients of morphogens encoded by maternal effect genes determine what? Choices: - cell mass - cells axes - body mass - body axes A:
body axes

Q: Q: Eggs are produced in what organs and, upon fertilization, develop in what other organ? Choices: - fallopian tubes, ovaries - cervix, ovaries - uterus, vagina - ovaries, uterus A:
A: ovaries, uterus

Question: Q: What term is used to describe the attractive force between molecules of the same substance? Choices: - magnetism - attraction - strength - cohesion A:
Answer: cohesion

*Question*
Q: What are all cells surrounded by? Choices: - cytoplasm - cell substrate - amino acids - cell membrane A:
**Answer**
cell membrane

(Q).
Q: What kind of succession occurs in an area that has never before been colonized? Choices: - addition succession - secondary succession - support succession - primary succession A:
(A).
primary succession