Early cell division in an embryo is called 

A. cleavage.
B. implantation.
C. fertilization.
D. meiosis.


A. cleavage.

Biology & Microbiology

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You are surveying biodiversity on a new island chain. You have counted the number of bird species on one island already. The next island is larger and closer to the mainland than the one you have just surveyed

According to the theory of island biogeography, the total number of its bird species should be ____ than on the current island because the rate of immigration to the new island should be ____ and the rate of extinction should be ____ . Refer to Figure 46.17 in your text for help. Fill in the blank with the appropriate word.

Biology & Microbiology

All nucleated cells contain

A. IgE receptors. B. class II MHC. C. class I MHC. D. IgD receptors. E. secretory antibodies.

Biology & Microbiology

The movement of both oxygen and carbon

dioxide in the body is accomplished by a. exocytosis and endocytosis. b. facilitated diffusion. c. osmosis. d. simple diffusion. e. active transport

Biology & Microbiology

T or F: The dark banding seen in muscle tissue is the result of actin

What will be an ideal response?

Biology & Microbiology