What is a transgenic organism?
a. an organism with multiple copies of the same gene
b. an organism that has genes from another species
c. an organism that does not use DNA to specify proteins
d. an organism that has had its entire genome sequenced
e. an organism that has been DNA profiled
ANSWER: b
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In itself, a flood that washes away an entire
population of rabbits is
a. a density-dependent factor. b. an intrinsic limiting factor. c. density-independent. d. a consequence of exponential growth. e. an example of a population reaching its carrying capacity
Net primary productivity in an ecosystem increases as mean annual temperature
A) and mean annual rainfall decrease. B) decreases and mean annual rainfall increases. C) increases and mean annual rainfall decreases. D) and mean annual rainfall increases.
Flowering plants appeared in the fossil record in the:a
Cenozoic era. b. Late Cretaceous period. c. Paleozoic era. d. Jurassic and Lower Cretaceous periods. e. Tertiary period.
Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific ________ that the immune system produced against the virus.
Fill in the blank(s) with the appropriate word(s).