Why do some organisms have vestigial organs? What will be an ideal response?
Vestigial organs are the remains of structures that were once functional in an ancestor, but
offer no or reduced function now. Over time, natural selection has favored the reduction in
size of these structures which serve little or no useful purpose.
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African river blindness is caused by a roundworm carried by biting black flies. When bitten by a fly, larval worms are passed through the wound. Inside a human body, the parasites cause skin problems and eventually blindness. Which type of species interaction is represented here?
A. parasitism B. predator-prey C. commensalism D. resource partitioning
List the two techniques that are most commonly used to mine coal: ___________ and
_________. Fill in the blank(s) with the appropriate word(s).
Part of the cause of the greenhouse effect is the near ________ of the atmosphere to solar radiation
Fill in the blank(s) with correct word
Glaciers have existed throughout all of Earth's history
Indicate whether the statement is true or false