Freshly isolated animal tissue that is placed in a growth medium and allowed to produce a cell monolayer is referred to as a ________ cell culture.
Fill in the blank(s) with the appropriate word(s).
primary
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Assume the trait for brown eyes is completely dominant to blue eyes and this trait is controlled by a single gene. If 400 people in a population of 10,000 have blue eyes, how many people would be expected to be heterozygous for this trait? (Hint: Use the Hardy-Weinberg formula.)
a. 8,000 b. 5,400 c. 3,200 d. 960 e. 320
Which statement is true for scyphozoan medusae?
a. They are the dominant body form. b. They are generally smaller than hydrozoan medusae. c. Most live in freshwater. d. They are scavengers.
If an object were collected on Mars by the rover Curiosity, it would be considered a living organism if it ________
A) responded to environmental stimuli B) had metabolic activities and maintained homeostasis C) contained DNA and reproduced D) All of the above are true.
The process illustrated in the accompanying figure is known as:
a. humus formation. b. weathering. c. cation exchange. d. soil erosion. e. salinization.