Biology, 17.10.2019 02:50 fortwill05
Some species of present day protists contain living organisms within their cytoplasm. paramecium bursaria are hosts for zoochlorellae, photosynthetic protists, that live within the cytoplasm of the paramecium. the relationship appears to be symbiotic; the zoochlorellae gain protection and possibly some essential nutrients from the host cytoplasm and the paramecium host has an available food source when its usual food source is depleted. this symbiotic relationship provides support for the theory of endosymbiosis, which states that a) animal-like cells evolved from ancestors that were photosynthetic. b) mitochondria and chloroplasts evolved from small prokaryotes living within larger cells. c) photosynthetic organisms, like today's land plants, evolved from photosynthetic bacteria. d) heterotrophic organisms could not have evolved before the evolution of photosynthetic organisms.
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Biology, 22.06.2019 18:50
What is the volume of a book that has a width of 10 cm a length that is 2 times the width and a height that is half they would remember to express your answer in keeping units
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Some species of present day protists contain living organisms within their cytoplasm. paramecium bur...
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