While gutting a fish, nathan encountered an air-filled sac-like structure. what is the purpose of this structure in fish?

a.
it enables fish to breathe in water.
b.
it serves as a reserve space to store fat.
c.
it harbors bacteria that benefit the fish.
d.
it provides buoyancy to the fish.

Aperson with age is more likely to catch diseases that healthy people usually don’t catch. what are these infections called?

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone

Hurry i need your (100 points) 1) what are the responsibilities of the region of the brain highlighted below? (picture located below) the highlighted portion is at the rear base of the brain, behind the brain stem. regulating homeostasis, hunger and eating, thirst and drinking, and many other functions of basic survival. coordinating movement and balance by using information from sensory nerves, including hand-eye coordination. controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities. regulating important involuntary bodily functions such as blood pressure, heart rate, breathing, and swallowing. 2)which of the following systems or structures is correctly paired with its function? neurons - brain cells that control thoughts, calculations, and memory cerebral cortex - portion of the brain that controls involuntary body movement peripheral nervous system - carries impulses to and from the central nervous system central nervous system - carries information from the nerves to the muscles and glands