You are a substitute teacher in a high school biology lab class on the day the students are dissecting frogs. A particularly bright student happens to notice that the left adrenal gland is malformed in her frog. She asks if a problem in embryonic
development could have caused that. Although there may be more than one reason, what might you propose as an explanation based on embryonic development?
What will be an ideal response?
Neural crest cells that produce part of the gland may have died or failed to migrate properly.
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A lens
(a) is the amount that an object’s image is enlarged. (b) is the extent to which detail in an image is preserved during the magnifying process. (c) is the degree to which image details stand out against their background. (d) focuses light rays emanating from an object to produce an image.
A woman has six fingers, but one of her parents has five fingers. She marries a man who has
five fingers. What is the probability that they will have a child who is homozygous dominant for this trait?
a. 0 percent b. 25 percent c. 50 percent d. 100 percent
Hair follicles are a variation of ________ tissue
A) loose connective B) dense connective C) nerve D) muscle E) epithelial
A friend of yours is wondering about the differences between the words "orientation" and "navigation" when these two terms are used in descriptions of bird migrations. Since you have studied and know something about animal behavior, what do you tell your friend?
A. Orientation is following a bearing, while navigation is setting or adjusting a bearing. B. Orientation and navigation are used interchangeably when referring to avian migrations. C. Orientation is the ability to find true east, navigation is the ability to find a bearing while crossing water. D. Orientation is adjusting a bearing, while navigation is actually following a bearing. E. Orientation is following the sun in the day as starling do, while navigation is following a bearing with a small amount of magnetite, which is found in the heads of some migratory birds.