The Earth's carrying capacity is:
a. 1 billion.
b. 1 million.
c. 4 billion.
d. 16 billion.
e. unknown.
E
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Honeybees must maintain specific temperatures to thrive. On hot days, the hive can quickly
overheat, so some bees will stand near the entrance and fan their wings to provide cool air currents into the hive. In winter, honeybees cluster together in their hives and vibrate their wings in a form of shivering to generate heat and maintain the hive at a constant temperature. This heating and cooling is a form of
a. homeostasis. b. evolution. c. competition. d. homology
Homologous structures were "discovered" by findings that indicated that ____
a. species on different continents were not similar in form b. different geological layers held different kinds of fossils c. structures of similar form and position occurred in animals of markedly different size, shape, and lifestyle d. some structures found in animals are apparently useless e. some kinds of animals had apparently gone extinct
In peas, tall plants are dominant to short plants. A cross between a tall pea plant and a short pea plant results in half the progeny being tall, and the other half being short. Therefore, the tall parent plant is genotypically
A) homozygous. B) heterozygous. C) hemizygous. D) monozygous. E) homogeneous.
The ___________ is the gel-like material plus the cell's organelles
Fill in the blank(s) with the appropriate word(s).