A species that evolved in one community and later became established in a different one is known as a(n) _________.
A. endemic species
B. exotic species
C. indicator species
D. keystone species
E. pioneer species
Answer: B
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Fuels such as gasoline are nonpolar and high in energy because they are largely composed of
A. sulfates. B. hydrocarbons. C. carboxylic acids. D. amines. E. carbonyls.
One major difference between prokaryotic and eukaryotic genes is that eukaryotic genes can contain internal sequences, called ________, that get removed in the mature message
Fill in the blank(s) with correct word
Ozone molecules in the stratosphere shield the Earth from damaging UV radiation
___________________ Indicate whether the statement is true or false.
Which category of nutrient would be best described as compounds needed in small amounts in the diet to facilitate chemical reactions in the body?
A) lipids B) enzymes C) trace minerals D) vitamins