Which of the following is NOT a way that many terrestrial ectotherms regulate their temperature?
a. moving into or out of the shade
b. panting
c. changing the angle of the body relative to the sun
d. changing blood flow to the skin
e. thermoregulation
E
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A farmer is concerned that if she plants seeds for her next harvest, many of them will remain dormant and fail to grow. Depending on the plant, what steps can the farmer take to ensure that many of her seeds will germinate?
A. She can treat her seeds with red light prior to planting. B. She can put her seeds in the refrigerator for a few months before planting. C. She can rub her seeds with sand paper prior to planting. D. She can feed the seeds to her cows and collect them after they have passed through the animals' digestive tracts.
Mendel observed that some genetic traits seemed to mask others in the pea plants. The masking trait is referred to as the
A. dominant trait. B. recessive trait. C. leading trait. D. homozygous trait. E. heterozygous trait.
Mammals are united by what features?
A. Hair B. Placenta C. Producing milk for their young D. Both A and C E. All of the above
Which of the following is the best definition of "empty magnification"?
A. An image is magnified so much resolution and contrast are lost. B. A specimen is so lacking in color it cannot be observed on a light microscope. C. A magnified specimen is so small it cannot be resolved on a light microscope. D. The background on the field is almost totally black. E. A magnified image has lots of empty space around a small object.