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gladu [14]
2 years ago
5

Relatively little is known about many obligate anaerobes. Why might this be so? A. The obligate aerobes are far more numerous, a

nd also far more interesting. B. It's much harder to provide the right atmospheric environment to cultivate obligate anaerobes, so it's been harder to study them. C. Only obligate aerobes cause disease, so we've had little reason to study obligate anaerobes. D. The majority of obligate anaerobes are very nutritionally fastidious, which has slowed their study.
Biology
1 answer:
anyanavicka [17]2 years ago
7 0

Answer:

B. It's much harder to provide the right atmospheric environment to cultivate obligate anaerobes, so it's been harder to study them.

Explanation:

Obligate anaerobic bacteria are the ones that can grow only in the absence of oxygen. These bacteria do not derive the energy from aerobic cellular respiration and die when exposed to the presence of oxygen.

Owing to their oxygen sensitivity, the culturing of obligate anaerobic bacteria requires special equipment to ensure the absence of oxygen.

The presence of aerobic conditions in laboratories makes their culture and study harder than that of the aerobic or facultative anaerobic bacteria.

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3 0
3 years ago
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A person will most likely develop aphasia as a result of damage to which parts of the brain?
Anna11 [10]

Answer:

The correct answer is Broca's area or Wernicke's area.

Explanation:

Aphasia refers to a language disorder, which arises due to the destruction of the parts of the brain, which are accountable for language. Aphasia generally causes due to the destruction of Wernicke's area or Broca's area. For the majority of the individuals, these are the sections of the brain's left hemisphere.  

The condition known as aphasia generally takes place suddenly, usually as the outcome of a head injury or stroke, however, it can also arise gradually, in the individuals suffering from a brain tumor. The disorder hampers both the comprehension and expression of language and at the same time the tendency to read and write.  

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2 years ago
In 1953, the scientists James Watson and Francis Crick published their landmark findings on the structure of DNA. Watson and Cri
Digiron [165]

Answer:

The correct selection of answers to the question: Identify the pieces of evidence describing the features of DNA that Watson and Crick used to determine the structure of DNA, would be:

C: The two chains are parallel, both running in a 5´ to 3´ direction

D: A purine base forms hydrogen bonds to pair with a pyrimidine base located on the opposite DNA strand. Specifically, A pairs with T, and C pairs with G.

E: The sugar-phosphate backbones of each DNA helix run antiparallel to one another

F: The diameter of the DNA doube helix is 2 nm, with each purine-pyrimidine base pair spanning an equivalent distance between the two chains.

Explanation:

Although Watson´s and Crick´s research, and model of the DNA helix, became the breakthrough for science, as it visually presented the now known characteristics of DNA, this research was possible due to the way that these two researchers used previous information found by other scientist on the molecule, to finally build their model. All of the options that were selected were part of the research of several scientis, including Mendel, Rosalin Franklin, Linus Pauling, Maurice Wilkins, Oswald Avery and many others, who worked on different aspects of specimens and their specific characteristics, and which led them to discover that organisms possessed DNA, that this was the unit of information that directed all functions in living cells and how this DNA helix was chemically built to understand how it worked, and why it worked the way it did.

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