Most triploid zygotes probably arise from ____
a. incomplete meiosis I
b. incomplete meiosis II
c. incomplete mitosis
d. nondisjunction
e. dispermy
e
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An infectious organism isolated from a patient has a sequence on its genome TATTGAAGC. This will hybridize to the RNA probe UAUUGAAGC.
Answer the following statement true (T) or false (F)
Reactions that break down food sources to fuel the energy needs of a cell are called anabolic, whereas those that result in net energy storage are called catabolic
A. true B. false
According to the Oparin-Haldane hypothesis, which of the following was probably NOT a major
component of Earth's early atmosphere?
a. O2 (oxygen) b. H2 (hydrogen) c. CH4 (methane) d. H2O (in vapor form) e. NH3 (ammonia)
Angiogenesis contributes to carcinogenesis because it
A. allows tumor cells to invade underlying tissues. B. causes additional mutations to occur in tumor cells. C. allows tumor cells to spread to other parts of the body. D. causes blood vessels to grow into the tumor. E. causes apoptosis in tumor cells.