Which of the following is NOT a characteristic of
birds?
a. feathers modified from scales
b. a four-chambered heart
c. excellent vision
d. migratory behavior
e. teeth
Answer: e
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The composition of plasma is not fully known due to its complexity
Indicate whether the statement is true or false.
Hemocyanin:a
combines irreversibly with oxygen for transport within the body of various organisms. b. is bright red in color when combined with oxygen. c. has an iron-porphyrin group that is responsible for oxygen transport. d. is a respiratory pigment found in the blood of some invertebrate and vertebrate species. e. is a respiratory pigment that is colorless when deoxygenated.
Which of the following components is NOT involved in the phosphorus cycle?
A) Some rocks and soil B) The atmosphere C) Consumers D) Decomposers E) Producers
The movement of individuals from one population to another can alter the allele frequencies in one or both of the populations. This is an example of ______.
a) genetic drift b) mutation c) gene flow d) natural selection