A scientist observes a previously unknown species. It is multicellular and has specialized sense organs. Based on the diagram of the kingdom levels below, this organism should most likely be classified in what kingdom? A

Animalia

B

Fungi

C

Plantae

D

Protista

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?