What is the primary cause of allopatric speciation?
a. Geographic separations
b. Chromosomal abnormalities
c. Limited natural resources
d. Microevolution factors
a. Geographic separations
Geographic separations are the primary cause of allopatric speciation.
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The megaspore produces a plant with ____
cells. a. 2 b. 7 c. 8 d. 14 e. 16
Judah Folkman performed an experiment in which he found that small tumors floating in the anterior chamber of the eye grew little, whereas a similar tumor implanted directly onto the iris grew to thousands of times its original size
These results supported his idea that continued tumor growth is dependent on requirement of tumor growth for A) continued exposure to a carcinogen. B) evasion of apoptosis. C) angiogenesis. D) metastasis. E) a stepwise series of gene mutations.
The geneticist who discovered the white eye mutation in Drosophila and helped establish that genes are carried on chromosomes was
A. Janssens. B. Morgan. C. Sutton. D. Mendel. E. Sturtevant.
The advantages of DNA vaccines include
a. no possibility of infection. b. activation of T and B cells. c. targeted immune response. d. all of the above.