The food consumed by an animal is converted into smaller and simpler compounds by its digestive system. These compounds can be easily absorbed by the body and provide energy.
What happens to the molecules that make up the food an animal eats?
A.
The atoms in the molecules are changed into new types of atoms through chemical reactions.
B.
The atoms in the molecules are used up by chemical reactions in order to make energy.
C.
The atoms in the molecules are copied to produce more atoms through chemical reactions.
D.
The atoms in the molecules are rearranged through chemical reactions to make new substances.
D. The atoms in the molecules are rearranged through chemical reactions to make new substances.
A class of students is learning about how a drought can affect grasshopper populations. They go to a park in which the grass is mostly brown-colored. They know that grass turns brown when there are droughts.
Their teacher has a bag of 100 brown marbles and 100 green marbles. Two of the students spread all of the marbles from both bags over a field. Afterwards the class is asked to pick up as many marbles (representing predators attacking prey) as they can find in 5 minutes. The data collected is shown below.
Color
of Marble Number
Found
Number
Not
Found
brown 12 88
green 79 21
The teacher asks the class to look at the data and think about how this activity shows what would likely happen to a grasshopper species in time of a drought. What does the data show about a grasshopper species in times of drought?
A.
The green-colored grasshoppers are more likely to be smaller than brown-colored grasshoppers.
B.
The brown-colored grasshoppers are more likely survive and reproduce than green-colored grasshoppers.
C.
The green-colored grasshoppers are more likely survive and reproduce than brown-colored grasshoppers.
D.
The brown-colored grasshoppers are more likely to be smaller than green-colored grasshoppers.