What key assumption of the endosymbiotic theory is observed in living animals?
What will be an ideal response?
Engulfed cells and organelles are observed to survive in the cytoplasm of the ingested cells. These
include algae or cyanobacteria that are living in the cytoplasm of an animal cell. There are examples of
species in at least 150 genera distributed among 11 phyla.
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The movement of substances to regions of lower concentration is called
A. active transport. B. diffusion. C. pinocytosis. D. pumping. E. exocytosis.
The best way to directly observe Treponema pallidum is through ________ microscopy.
A. bright-field B. scanning electron C. dark-field D. phase contrast E. fluorescent
Components of vertebrate plasma include
A. red blood cells. B. water. C. nutrients. D. oxygen. E. white blood cells.
ER is an abbreviation for _______ ________.
Fill in the blank(s) with the appropriate word(s).