What is a structure that some single-celled organisms have in order to move?

-arms

-tails

-cilia

Stentor is classified in the kingdom Protista. What features, both internal and external, should be considered, when classifying this organism

53 The plants in an ecosystem produce food for most of the other organisras that live in that ecosystem. The role of a plant in its ecosystem is its A habitat B niche C mutation D trophic level

Acidic solutions have a pH that is

How do natural disasters contribute to genetic drift?

Which of the following statements is true regarding veins versus lymphatic collecting vessels? Veins and lymphatic vessels have a different number of tunics. Veins have thinner walls than do lymphatic vessels.

Three different core areas designed to protect an endangered beetle each have a buffer zone associated with them. in buffer zone a, the birth rate of the beetle is 0.04, and its death rate is 0.08. in buffer zone b, the birth rate of the beetle is 0.

Which gastrointestinal hormone stimulates secretion of the components of hydrochloric acid?

Which of these types of rock can melt under the right conditions?

Preschoolers' understanding that sugar continues to exist when it is dissolved in water is evidence that they a. do not understand cause-and-effect relationships. b. can think logically even about unfamiliar topics. c.

What are two phases of speciation