Which one of these is not an example of intercellular communication?

a. nerve signal transmitted from brain to skin cell

b. pituitary hormone regulates body temperature

c. signaling molecule defused through plasmodesmatum of plant

d. energy production in mitochondria

me

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.

What processes would you expect to be key in the production of yogurt ?

Suppose you are provided with an actively dividing culture of e. coli bacteria to which radioactive thymine has been added. what would happen if a cell replicates once in the presence of this radioactive base?