Which statement describes the function of cholesterol in membranes? a) Enables the membrane to stay fluid more easily when cell temperature drops.
b) Enables the membrane to remove hydrogen atoms from saturated phospholipids.
c) Enables the membrane to add hydrogen atoms to unsaturated phospholipids.
d) Makes the membrane more flexible at high temperatures.

Drag each label to the correct location on the image. each label can be used more than once. a scientist introduced mutations in a gene sequence isolated from bacteria. study the sequence, and identify the steps where the mutations may affect the formation of proteins. in the sequence, black letters stand for protein coding regions and red letters stand for noncoding regions. protein will not be changed. protein may be changed. attcgtgttc atcgtgttc atcgtattc attcgtattc

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment