The endosymbiotic theory says that precursor eukaryotic cells acquired cilia by endosymbiosis with a(n) ________ ancestor and others gained photosynthetic ability from endosymbiosis with a(n) ________ ancestor.

A. helminth, algal
B. spiral, cyanobacterial
C. protozoan, algal
D. archaeal, cyanobacterial


Answer: B

Biology & Microbiology

You might also like to view...

While lancelets, members of the lineage ____, live mostly buried in the sand in warm, shallow marine habitats, they

do have well-developed segmented muscles and can move.

a. Petromyzontoidea b. Placodermi c. Cephalochordata d. Urochordata e. Myxinoidea

Biology & Microbiology

Modern oceanography and marine biology were attributed to:

a. the voyage of the Beagle. b. the discoveries of Alvin. c. the laying of the transatlantic telegraph cable. d. expeditions of Alexander Agassiz. e. the Challenger expedition.

Biology & Microbiology

Species richness is greatest at which latitude?

a. 60 degrees north b. 60 degrees south c. 0 degrees d. 40 degrees north e. 20 degrees south

Biology & Microbiology

Blood poisoning (septicemia) is typically treated with transfusions

Indicate whether the statement is true or false

Biology & Microbiology