What happens when rocks are newly exposed (or created) in an area?
a. k-selection
b. r-selection
c. primary succession
d. secondary succession
c. primary succession
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Some scientists believe that any Martian organisms would most closely resemble members of the Archaea on Earth. What is the basis for their thinking?
What will be an ideal response?
The great adaptive radiation that resulted in all
of the major animal lineages occurred in the ___ period.
a. Cretaceous b. Devonian c. Jurassic d. Ordovician e. Cambrian
How does a cell typically know when to divide?
A) Cells have an internal clock and divide only when they reach a certain age. B) Tumor suppressor genes code for growth factor proteins that initiate cell division. C) Proto-oncogenes code for growth factor proteins that initiate cell division. D) Oncogenes code for growth factor proteins that initiate cell division.
In red-winged blackbirds, females tend to choose males with the most desirable territories and males compete with each other for territories.True or false: Redwing blackbirds demonstrate both intersexual selection and intrasexual selection.
Answer the following statement true (T) or false (F)