Organisms that obtain energy and nutrients by absorbing or ingesting other organisms.
a: heterotrophs
b: autotrophs
c: decomposers

Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

Explain the process that creates the heat of the sun?