Animals with a menstrual cycle do NOT
a. have an estrous cycle.
b. develop endometriosis.
c. display periods of sexual interest.
d. produce estrogen.
e. undergo menopause.
Answer: a
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A population ecologist wants to estimate the size of a robin population. In an apple orchard, she captures 10 robins,
marks them, and then releases them. She returns several weeks later and captures another 10 robins, of which 2 are robins she previously marked. The estimated population size of robins is ____.
a. 50 b. 15 c. 10 d. 200 e. 20
When mixed with water, phospholipids spontaneously form membranes because they ________
A) have hydrophilic phosphate groups that are attracted to water and hydrophobic fatty acid tails that avoid water B) have hydrophilic fatty acid tails that are attracted to water and hydrophobic phosphate groups that avoid water C) have hydrophilic heads that are attracted to their hydrophobic tails D) are both fluid and mosaic
If temperatures suddenly rise 5 to 10ยบ C, ________ proteins are produced to help stabilize other proteins.
A. heat shock B. photosensitive C. denatured D. chilling E. oxidative
Which of the following statements is true?
What will be an ideal response?