1. Most animals that use tools use them for what reason?
A. as a weapon
B. to build things
C. to get food
D. to fix their homes
4. A(n) __________ is a reproductive cell that transfers or receives chromosomes.
A. amnio
B. gamete
C. ovary
D. spawn
2. The jumping of a cat when it hears a loud noise is an example of a(n)
A. reflex
B. instinct
C. intelligent behavior
D. pheromone response.
5. (True or False) Animals can acquire some learned behaviors without human help.
A. True
B. False
3. (True or False) Pheromones are special chemicals produced only by insects to attract a mate.
A. True
B. False
6. Which of these is not found in a bird egg?
A. yolk
B. albumen
C. umbilical cord
D. nucleus