Herbivory by rabbits on a grass species has an overall beneficial effect on the grass.
Answer the following statement true (T) or false (F)
False
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Which go these observations gives the most support to the endosymbiotic theory for the origin of eukaryotic cells?
a. the existence of structural and molecular differences between the plasma membranes of prokaryotic and the internal membranes of mitochondria and chloroplasts b. the similarity in size between the cytosolic ribosomes of prokaryotes and the ribosomes within mitochondria and chloroplasts c. the size disparity between most prokaryotic cells and most eukaryotic cells d. the observation that some eukaryotic cells lack mitochondria
Apicoplasts are structures of apicomplexans that
a. provide motility. b. function in transmission. c. serve as resting stages. d. are degenerate chloroplasts lacking pigments.
Elephants can live for between 50 and 70 years
and a cow (female elephant) typically gives birth to 3 or 4 calves. What type of survivorship curve applies to them?
a. type I b. type II c. type III d. none of these types e. more than one of these types
The depth to which light penetrates with sufficient intensity to support the activities of photoautotrophic organisms in the ocean is called the ________ zone.
Fill in the blank(s) with the appropriate word(s).