Q: When plants lose their leaves in the fall, what chemical is produced less to cause the change? Choices: - pheromes - carbonate - oxygen - chlorophyll A:
chlorophyll

Q: What is the distance between the nuclei of two identical atoms bonded together called? Choices: - cycle radius - bond radius - sleep radius - atomic radius A:
atomic radius

Q: Q: What two phases does the cell cycle consist of? Choices: - antecedent and mitotic - mitosis and mitotic - outerphase and mitotic - interphase and mitotic A:
A: interphase and mitotic

Question: Q: The atomic number is the same as the number of what in an atom? Choices: - neutrons - ions - electrons - protons A:
Answer: protons

*Question*
Q: What type of reproduction begins when an egg and sperm combine? Choices: - natural reproduction - regular reproduction - asexual reproduction - sexual reproduction A:
**Answer**
sexual reproduction

(Q).
Q: Melting points are temperatures that are high enough to separate liquids from which substances? Choices: - gases - seeds - oils - solids A:
(A).
solids