Which of the following resources is natural, biotic, and exhaustible?

a. silk,

b. forest,

c. minerals,

d. water

Genetic variability is the most important result of asexual reproduction sexual reproduction

Caffeine is a stimulant to the central nervous system. regular consumption may cause physical dependence; would it be appropriate to consider caffeine an addictive substance?

How do you describe what a tarantulas burrow looks like?

What power source is the best in order to comply with city restrictions

Which of the following is a producer? A a crow that consumes a dead animal on the side of the road B a fish that eat smaller fish for its food C agiraffe that eats the leaves of the trees D a plant that has insect larva feeding on its roots

Of the 30000000 species on earth, how many are lost each hour?

What are two molecules that carry energy in a biochemical pathway

Which of the following causes a tumor to form

Why might a water table drop

How did the 1898 discovery of blood types affect society?