The endosymbiotic theory _____.

Biology

2 answers:

11111nata11111 [884]3 years ago

5 0

2. The endosymbiotic theory suggests that a eukaryotic cell is the result of one prokaryotic cell eating another.

Free_Kalibri [48]3 years ago

4 0

The correct answer is 2. suggests that a prokaryote ate another prokaryote to produce eukaryotes.

Lynn Margulis (1960) put forward the endosymbiotic theory. The theory states that aerobic bacteria, a prokaryotes require oxygen were engulfed by anaerobic bacteria, also prokaryotes which are poisoned by oxygen. They live together as symbiotic partners for mutual benefits. The aerobic bacteria take care of the toxic oxygen for the anaerobic bacteria, in return the anaerobic bacteria would ingested food and protected the aerobic bacteria. Thus, a eukaryotic cell with a double-membrane bound organelle is formed. The inner lipid bilayer is of engulfed bacterial cell plasma membrane, and the outer lipid bilayer is of bacterial cell that engulfed it.

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Dmitriy789 [7]

Terms matched with the right definitions.

1. An organism that can make its own food – Autotroph

2. A symbiotic relationship between two organisms in which one species benefits and no effect is apparent to the other species – Commensalism.

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5. A disease-causing organism - A germ pathogen.

6. A one- or few-celled organism with chromosomes; may have characteristics of both animals and plants – Protist.

An autotroph is an organism that produces its own food from simple substances available in its environment. Autotrophs usually use inorganic chemical reactions or light energy in producing their food and are usually the producers in a food chain. Examples of autotrophs are plants and algae.

Commensalism is a type of relationship between organisms of two species where one organism benefits from the relationship and the other organism is not affected by it (neither benefits nor harmed).

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Oksi-84 [34.3K]

Among the non-mammalian vertebrates, the cloaca is an anatomical structure that function as a shared pathway for the digestive, excretory, and reproductive systems. Cloaca in vertebrates, common chamber and outlet into which the intestinal, urinary, and genital tracts open. It is present in amphibians, reptiles, birds, elasmobranch fishes, and monotremes. Cloaca is not present in placental mammals or in most bony fish.

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4 years ago

Which step can occur even more rapidly by PCR?a. target DNA removed from cells and isolated b. cloning host treated with calcium

lisabon 2012 [21]

Answer:

E. Gene is amplified by multiplication of cloning host

Explanation:

PCR is a very powerful technique that can help us to amplify exponentially one gene from a very small sample of DNA.

As seen in the attached image, the process begins with a single DNA molecule, for the first cycle, that DNA molecule denaturalizes into two strands, the primers bind to their complementary sides and then the DNA polymerase builds the new DNA strands. The number of copies of the gene that can be obtained with each cycle are 2ⁿ copies, where n is the cycle number.