The carrying capacity of an area decreases if
A. the waste products are not removed.
B. the birthrate lowers.
C. more food is available.
D. All of these answers are true.
A. the waste products are not removed.
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A study of certain nuclear genes in humans and chimpanzees shows that the two species differ in 5 percent of their DNA bases. Base substitution mutations occur at a rate of 1 percent per one million years. How many million years ago did these species diverge?
A) 0.5 B) 1 C) 3 D) 5
The Venus flytrap receives its nitrogen by
trapping and digesting insects. This is a type of
a. commensalism. b. mutualism. c. competition. d. predation. e. parasitism.
The somatic senses include all EXCEPT which one
of the following sensations? a. balance b. pain near the body surface c. temperature d. touch e. pressure
Which of the following is a type of bacteria that is found in the Great Salt Lake?
a) Thermoacidophil b) Cyanobacteria c) Halophil d) Picornavirus e) Syphilis