What is the major assumption of the
exponential model of population growth?
a. resources are unlimited
b. organisms selectively choose their mates
c. the death rate equals the birth rate
d. biotic potential is limited
e. more than one of these is a major
assumption of the exponential model
A
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DDT is a(n)
a. blight that affects American chestnut trees. b. endangered plant species. c. pesticide. d. wildlife refuge area in Yellowstone National Park.
The average heart of a human beats ____ times per minute
a. 10 b. 53 c. 72 d. 95 e. 120
Which phenomenon is a likely consequence of thinning of the ozone layer?
A) more occurrences of skin cancer B) greater escape of heat from Earth C) global warming D) smaller flying insect populations
In females, estrogen plays a role in all of these regarding bone remodeling except _____
enhancing the absorption of calcium from the digestive system stimulating the formation of bone inhibiting the breakdown of bone allowing for release of thyroid hormone