Unlike cones, rods

a. aren't sensitive to light.
b. allow humans to see black and white.
c. respond to color.
d. are found in the retina.

Are characterized by dry conditions, limited vegetation and wide temperature range. a.) tropical rain forests b.) deserts c.) grasslands d.) none of the above

Indica el nombre y la fucion de los vasos sanguineos que entran y salen de los riñones

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating