Consider the following planned experiment.
Factor
Experimental Group Control Group
light exposure
lots of sun
lots of sun
amount of water
weekly
weekly
type of soil
nutrient rich
nutrient rich
size of pot
large
small
Which variable is being tested in this experiment?
O A. Amount of water
O B. Size of pot
Ос. Type of soil
O D. Light exposure

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.