Which of these examples demonstrates metabolism?
a.
a person eats a large dinner for digestion and energy.
b.
a human's skin has the ability to tan in the sun.
c.
a person puts on socks because his feet are cold.
d.
a dog gets sick and its immune system fights the disease.

Exit what always affects measurement error in an experiment? a. investigator bias b. variability in nature c. instrument precision d. misreading the instrument

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

What does natural resource management aim at ?