The atmosphere and seas of the early Earth lacked oxygen. What kind of organisms could NOT have lived under those conditions?
A. obligate aerobes
B. obligate anaerobes
C. cyanobacteria
D. chemoautotrophs
E. All of the other choices are correct.
A. obligate aerobes
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Most chytrids are ____
a. saprobes in soil b. parasites of plants c. symbiotic partners of cattle and other herbivores d. parasites of animals e. aquatic
Which is true of interneurons?
a. They detect stimuli. b. They receive and send signals. c. They control muscles. d. They control glands. e. They have a long axon.
Which sentence describes most golden algae?
a. They are unicellular and autotrophic. b. They are colonial and autotrophic. c. They are multicellular and heterotrophic. d. They are colonial and heterotrophic.
Which of the following statements is true?
A.) Prokaryotes divide by mitosis B.) Eukaryotes have circular chromosomes C.) Animal cells form new cell walls when they divide D.) Plant cells and animal cells have different strategies for cytokinesis