Consider the following planned experiment.
factor
experimental group
control group
amount of water
daily
daily
type of food
fresh grass
fresh grass
vitamins
yes
no
housing
indoors
indoors
which variable is being tested in this experiment?
o
a. amount of water
o
b. type of food
o
c. vitamins
o
d. housing

According to the cladogram, which organisms have roundworms as a common ancestor?

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

In "the pig," what is the main effect that the piglet initially has on kibuka?