What does the following formula represent? dN1/dt = r1N1(1 - (N1 + N2)/K1)
A) population growth of species 1 in absence of species 2
B) population growth of species 1 in presence of species 2
C) carrying capacity of species 1 in absence of species 2
D) population size in the presence of species 2
B
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Why did the average body weight of sociable weavers move in a stabilizing direction? a. Predators killed birds of medium body weight
b. Meager food supply selects against all birds equally. c. Predators randomly killed the birds. d. Meager food supply selects against birds of high body weight. e. Predators killed birds of high body weight.
Cores of coral reefs show a reef base that is well below the photic zone. How are two ways that is this possible, given the light limitations of reef-forming corals?
What will be an ideal response?
Nitrification ____.
A. converts ammonium into nitrates B. reduces nitrates to nitrites C. converts nitrogenous compounds into free nitrogen D. converts atmospheric nitrogen to ammonia E. reduces ammonia to ammonium
Bacteria and Archaea are both domains consisting of prokaryotic organisms.
a. true b. false