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
D
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The karyotype designation for a female with X chromosome trisomy is ____________________
Fill in the blank(s) with correct word
Factors that affect the final amount of stored energy in an ecosystem include all of the following
EXCEPT a. the size of the producers. b. the availability of mineral nutrients. c. how much sunlight and rainfall are available during a growing season. d. the temperature range. e. the type of decomposers.
Insect hormones and their receptors _____
A) act independently of each other B) are a focus in pest control research C) utilize cell-surface receptors only D) are active independently of environmental cues
You have been asked to explain to a high school class the first law of thermodynamics and how this law affects the students' lives. Using your own words, describe the first law of thermodynamics, and give an example (other than the examples described in
the chapter). What will be an ideal response?