Where does normal fertilization of an egg by a sperm in a human female occur?

A. near the cervix before the egg leaves the female
B. at the ovary upon ovulation
C. in the uterus before the egg has implanted
D. in the uterus after the egg has implanted
E. in the Fallopian tube


Answer: E

Biology & Microbiology

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Even though the autumn may be unusually warm, the leaves from deciduous trees begin to drop during September

Which of the following is the best explanation? a. The trees are responding to shorter days. b. The autumn months are usually wetter because the summer rains were delayed. c. The effects of phototropism are operating "right on schedule." d. There is not enough sunlight to carry on photosynthesis any longer.

e. The trees are responding to consistent temperatures.

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There are how many different kinds of amino acids

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If one ran the regression on whether a mortgage applicant was approved for a loan or not (Approvedi) on their income to debt ratio, this would be an example of what sort of model?

A. A fixed-effects model B. A linear probability model C. A within estimator model D. A two-stage least squares model

Biology & Microbiology

We know that that there are over 50 major phyla in Bacteria; however, only about 25 of these phyla have cultured representatives. Why is this?

How are scientists attempting to culture representative from the 25 phyla that do not currently have any organisms in culture? What will be an ideal response?

Biology & Microbiology