Which of these examples demonstrates homeostasis?
a. a bird flies south for the winter and flies back north in the spring.
b.
an amoeba takes in food and digests it.
c.
a cat runs away when it hears a noise.
d.
a person's body increases blood flow to its cold feet.

Which of the following is an example of an environmental change the affected the evolution of life a. volcanic activity b. changes in climate c. mountain building d. all of the above

Which of the following is not a defining characteristic of plants?

Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.