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snow_lady [41]
3 years ago
7

A hypothetical bacterium swims among human intestinal contents until it finds a suitable location on the intestinal lining. It a

dheres to the intestinal lining using a feature that also protects it from bacteriophages and dehydration. Fecal matter from a human in whose intestine this bacterium lives can spread the bacterium, even after being mixed with water and boiled. The bacterium is not susceptible to the penicillin family of antibiotics. It contains no plasmids and relatively little peptidoglycan. This bacterium derives nutrition by digesting human intestinal contents (in other words, food). Humans lacking this bacterium have no measurable reproductive advantage or disadvantage relative to humans who harbor this bacterium. Consequently, the bacterium can be properly described as which of the following?
(1). symbiont
(2). endotoxin
(3). mutualist
(4). commensal
Biology
1 answer:
Sonbull [250]3 years ago
5 0

Answer:

(1). symbiont

Explanation:

The bacterium inside the human intestine is a symbiont and the bacterium-human interaction is a symbiosis of the commensalistic type.

Commensalism is a biological interaction (symbiosis) in which members of one species -in this case the bacterium- gain benefits while those of the other species -in this case the human- neither benefit nor are harmed.

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Answer:

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Explanation:

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A (Adenine) pairs to U (Uracil).

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2 years ago
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The researchers will use mice instead of opossums or humans to determine whether the cells of the ear bones originated from the same embryonic cells as the cells that form the jaw in other vertebrates because in this type of experiment, organisms that are ideal are the ones that have a short life span, easy to be researched on and easy to mantain.

It will be very tedious and demanding to use opossums and humans in this type of practical experiment because,it is against the culture and norms guilding human living and existence to use humans as model organisms,opossums as well are very bad model organisms because unlike the mice,opossums are long lived and it will be very difficult to raise and maintain an opossum in a laboratory.

Humans and mice are both mammals just that human is a higher mammal but they share similar features in terms of pattern of development,though there is a clear difference during their early development,so because of the common ancestry shared by the mice and humans,the result of the experiment on the mice with share a close similarity with the pattern that is expected in humans.

8 0
2 years ago
Which of these invertebrates have segmented bodies.?
zhuklara [117]

<u>Answer:</u>

The correct answer option is C. Annelids.

<u>Explanation:</u>

Annelids are the invertebrates that have segmented bodies.

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These annelids contain largely segmented bodies with each segment having secondary subdivisions known as annuli which consists of elements of the different body systems which are essential for life, for instance the nervous system.

7 0
3 years ago
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Answer:

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Explanation:

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Drag and drop each phrase under the phenomenon it describes.
lubasha [3.4K]

Answer:

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Explanation:

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