Which of the following organisms would be grouped closest
together in a cladogram?
a. Crab and lobster
b. Bird and fish
c. Horse and snake
d. Octopus and spider

What is a population? a. all the members of the same species living in the same ecosystem at the same time b. the number of a species living in the same ecosystem over a period of time c. the total number of organisms living in an ecosystem at a point in time d. all the members of a food web in the same ecosystem