1. Which of the following is an example of an environmental pressure? (1 point)

the air pressure in the atmosphere
a lake that is gradually running out of water
a fight between two members of the same species
breeding between two members of the same species
2. Which of the following is the most likely example of a favorable mutation? (1 point)
a mutation that makes a rabbit able to run faster
a mutation that changes the color of a rabbit’s fur to bright orange
a mutation that changes the color of a rabbit’s eyes
a mutation that gives a rabbit a third ear
3. How does carbon become locked inside Earth? (1 point)
Tree roots expel carbon into the soil as they grow.
Humans use machines to pump carbon dioxide into large underground tanks.
Rocks become richer in carbon as time goes on.
The carbon-rich bodies of plants and animals decay into Earth as they die.
True/False
4. Carbon emissions lead to global warming by trapping the sun’s heat in the atmosphere. (1 point)
true
false