Which of these observations gives the most support to the endosymbiotic theory f

Question

Which of these observations gives the most support to the endosymbiotic theory for the origin of eukaryotic cells? the existence of structural and molecular differences between the plasma membranes of promotes and the internal membranes of mitochondria and chloroplasts the similarity in size between the cytosolic ribosomes of prokaryotes and the ribosomes within mitochondria and chloroplasts the size disparity between most prokaryotic cells and mast eukaryotic cells the observation that some eukaryotic cells lack mitochondria All protists are unicellular. eukaryotic. symbionts. monophyletic. mixotrophic. Plastids that are surrounded by more than two membranes are evidence of evolution from mitochondria. fusion of plastids origin of the plastids from archaea secondary endosymbiosis. Biologists think that endosymbiosis gave rise to mitochondria before plastids partly because the products of photosynthesis could not he metabolized without mitochondrial enzymes. all eukaryotes have mitochondria (or their remnants), whereas many eukaryotes do not have plastids. mitochondrial DNA is less similar to prokaryotic DNA than is plastid DNA. without mitochondria) CO_2 production, photosynthesis could not occur. On a field trip, a student in a marine biology class collects an organism that has differentiated organs. | cell walls of cellulose, and chloroplasts with chlorophyll a. Based on this description, the organism could be a brown alga, a red alga, a green alga, a charophyte recently washed into the ocean from a freshwater or brackish water source, or a land plant washed into the ocean. The presence of which of the following features would definitively identify this organism as a land plant? sporopollenin rings of cellulose-synthesizing complexes flagellated sperm embryos Commonalities to both charophytes and vascular land planks include sporopollenin. lignin. chlorophyll a. cellulose. chlorophyll b I, II, III V only I, III, IV, V only III and IV only II and IV only. The following question(s) refer to the generalized life cycle for land plants shown in the figure. Each number within a circle represents a specific plant or plant pan, and each number in a box refers to a biological process.

Explanation / Answer

35) Answer is B

36) All protists are Eukaryotes
So answer is C

37) Plastids also acquired by endosymbiosis of photosynthetic Cyanobacteria by eukaryote. In this way photosynthetic algal members are originated. In this case the plastids contain two membranes derived from Cyanobacteria. These algal members like green algae underwent endosymbiosis again by other eukaryote. This process is called secondary endosymbiosis. Thus the plastids in the eukaryotes which underwent secondary endosymbiosis contain more than two membranes; two membranes from Cyanobacteria and remaining from the algal member and the eukaryotic host.
So answer is D

38) Evidences show that the endosymbiosis gave rise to mitochondria before plastids. That evidence is the presence of mitochondria in all eukaryotes. Most of the eukaryotes contain well developed mitochondria and some eukaryotes contain reduced or modified mitochondria (Example: Diplomonads contain mitosomes and Parabasalids contain hydrogenosomes). Plastids are the membrane cell organelle that mainly involves in photosynthesis. They are only present in photosynthetic eukaryotes like algae, plants etc.
So answer is B

39) Answer is E

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