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Zigmanuir [339]
3 years ago
10

Endosymbiotic theory in chronological order

Biology
1 answer:
natka813 [3]3 years ago
6 0

Answer:The endosymbiotic theory states that some of the organelles in eukaryotic cells were once prokaryotic microbes.

Chronological order is a way of arranging actions, events or things according to the time they occurred. It is demonstrated by showing what happened first, what went on next, what came about in the succeeding occurrences,

Explanation:

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Choose the answer that best completes the blanks of this sentence in order. The two major groups of parasitic helminths include
Masja [62]

Answer:

The correct answer is - flatworms and roundworms.

Explanation:

Helminths are the group of free living and some are parastic organisms present in aquatic, terrestrial environment or in animals or plants respectively. parasitic helminths are the group of worms or organisms that lives inside the GI tract or other parts of the body of host and makes them weak. The two major groups of parasitic helminths are -

Flatworms (platyhelminths) is a parasitic helminths, have leaf like body which is thin and segmented while roundworms or nematode have cylindrical and unsegmented body.

Thus, the correct answer is - flatworms and roundworms.

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3 years ago
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Explanation:

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The hydrolysis of GTP to GDP carried out by tubulin molecules ________________. Group of answer choices a) tips the balance in f
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Answer:

The correct answer: C) allows the behavior of microtubules called dynamic instability.

Explanation:

Microtubules are structures that are part of the cytoskeleton and help provide structure and shape to eukaryotic cells, besides assisting in the transport of organelles and vesicles.

Microtubules are formed by the polymerization of a dimer of two tubulins.

Microtubules have the particularity of being able to easily assemble and disassemble, which enlarges and shrinks the microtubule respectively. This property of the microtubules is important to their functions and is called dynamic instability.

In order to achieve dynamic instability, tubulin dimers can bind two molecules of GTP - for polymerization to happen, one of the GTP molecules is hydrolyzed to catalyze the reaction, thus becoming GDP. In the same matter, the energy generated from the depolymerization with turn the GDP into GTP.

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