Special nerve cells in your brain sense a slight increase in the salt concentration of your blood. they send a signal to another part of your brain. your brain then stimulates you to do something that will return the salt concentration of your blood to normal. what does your brain do?

a. cause you to drink

b. cause you to shiver

c. cause you to sweat

d. cause you to eat
never mind it was a

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.