An example of a density-dependent factor that influences the size of a population is:

a. rainfall.
b. temperature.
c. a fire.
d. parasites.
e. an earthquake


d

Biology & Microbiology

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Which condition would most likely lead to an apparently normal human female?

a. Turner syndrome b. Down syndrome c. cri-du-chat d. Triple-X syndrome e. Klinefelter syndrome

Biology & Microbiology

After organic molecules have been formed in abundance, what is the next step that must occur in the

progression toward a living organism?

a. evaporation of the water the organic compounds are dissolved in b. dehydration reactions linking macromolecule monomers into larger molecules c. increasing availability of organic compounds d. the formation of a semi-permeable membrane e. aggregation of the different organic compounds so all of the pre-cell building blocks are in the same localized region

Biology & Microbiology

What type of soil contains the highest amount of oxygen?

A) sand B) clay C) silt D) gravel

Biology & Microbiology

Which of the following is true regarding tamarisk beetles?

a. They are damaging people's homes. b. They are moving through Arizona more quickly than predicted. c. They eat only tamarisk leaves. d. They are native to South America.

Biology & Microbiology