What category of organisms can mate and produce fertile offspring?

What is the closes relative of Canis lupus?

What is the source of energy for plants?

What makes up more than 50 percent of all living things?

Who finally disproved the theory of spontaneous generation?

What is the length of time called that an organism is expected to live?

What gas do some scientists think was missing from Earth's early atmosphere?

What is the part of an experiment that can be changed called?

What does the first word in a two-word name of an organism identify?

What SI unit is used to measure the volume of soda?

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