Produce oxygen that we need to live.
b. break down garbage and dead organisms.
c. change the genetic composition of plants and animals.
d. all the above

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.

When an object is moving away from you while still making a sound, the pitch of the sound is perceived to a. lower b. unchanged c. fluctuating d.higher