An example of passive parental care is ____
a. nutrients that cross the placenta
b. nursing
c. nurturing
d. the nest environment
e. protection from predators
ANSWER: a
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The probability of a couple having either a boy or a girl is ½. However, many families have more boys than girls and VICE VERSA. Why is the observed ratio of boys to girls in typical families different than the predicted ratio?
A. There is a large random sampling error due to the small size of families. B. There is a small random sampling error due to the small size of families. C. Humans are more heterozygous than is predicted by random sampling. D. The sex of each child is determined independently. E. Two of the answers are correct. There is a large random sampling error due to the small size of human families and the sex of each child is determined independently.
In the food chain grass ? antelope ? human ? lion, the antelope is ________
A) both an herbivore and a secondary consumer B) both a producer and a primary consumer C) both an herbivore and a primary consumer D) a secondary consumer only
What is the mechanistic theory?
a. Cancer spreading is determined by the pattern of blood flow b. Fertile environment in which compatible tumor cells could grow c. Age and gender determines the spread of disease d. None of the above
A procedure that divides organisms into two or more groups depending on their individual reactions to the same staining procedure is referred to as ________ staining.
Fill in the blank(s) with the appropriate word(s).