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Alisiya [41]
3 years ago
14

Genetic drift _____.

Biology
2 answers:
STALIN [3.7K]3 years ago
7 0

The correct answer is A) a predictable event

RideAnS [48]3 years ago
3 0

<span>Genetic drift is a predictable event alongside with natural selection, mutation, and migration. In every era of generation, organisms’ genes may be passed on to its species, to further the usable genetic trait while the not-so-used genes are trashed away.</span>

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Select each correct answer. More than one answer may be correct.
MariettaO [177]

Answer:

I think that the answer might be b and c

7 0
2 years ago
A specialized cell performs
N76 [4]
Specialized cells perform specialized functions in multicellular organisms.
3 0
2 years ago
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Milk is converted to yogurt under certain conditions when the microorganisms in the milk produce acid. Which of these processes
oee [108]

Milk is converted to yogurt under certain conditions when the microorganisms in the milk produce acid. Which of these processes would you expect to be key in the production of yogurt?

a. Photosynthesis

b. Lactic acid fermentation

c. Krebs cycle

d. Alcoholic fermentation

Answer:

b. Lactic acid fermentation

Explanation:

Lactic acid fermentation occurs when pyruvate formed by glycolysis is reduced into lactate under the anaerobic conditions. The NADH serves as an electron donor for the reduction of pyruvate into lactic acid. Lactic acid bacteria are the anaerobic bacteria that ferment the milk sugar lactose into lactic acid. This converts the milk into yogurt. <em>Lactobacillus, Streptococcus salivarius</em>, etc. are mostly responsible for the conversion of milk into yogurt.

8 0
3 years ago
Write a 600 word report discussing nuclear reactors. The report should include a description of the way a reactor works and the
barxatty [35]

Answer:

Explanation:

A nuclear reactor is an installation capable of initiating, maintaining and controlling the chain fission reactions that take place in the reactor core, consisting of the fuel, coolant, control elements, structural materials and moderator in the case of nuclear thermal reactors.

The core is the part of the reactor where the nuclear chain reaction is produced and maintained.

Components of the core:

The fuel of a nuclear reactor is fissionable material.

Control rod beams provide a rapid means of controlling the nuclear reaction, allowing rapid changes in reactor power and eventual shutdown in case of emergency.

The neutrons produced in fission have a high energy in the form of velocity. Their speed should be reduced to increase the probability of other atoms fissioning and not to stop the chain reaction. This is achieved by elastic collisions of the neutrons with the nuclei of the moderator.

Most of the energy released by fission is in the form of heat. To be able to use this, a refrigerant must pass through the interior of the reactor that absorbs and transports this heat.

In a nuclear chain reaction, a certain number of neutrons tend to escape from the region where it is produced. This neutron leakage can be minimized by the existence of a reflecting medium, thus increasing the efficiency of the reactor.

When the reactor is in operation, a large amount of radiation is generated. Protection is needed to isolate the installation workers from radiation caused by fission products. Therefore, a biological shield is placed around the reactor to intercept these emissions.

A breeder reactor is a nuclear reactor that generates more fissile material in the fuel than it consumes. Considered highly attractive because of their superior fuel economy: a normal reactor consumes less than 1% of the natural uranium that starts the fuel cycle, while a 'breeder' can burn it almost completely. It also generates less waste for the same amounts of energy. Breeders can be designed to use thorium, which is more abundant than uranium. Currently, there is renewed interest in both breeder designs due to the increased price of natural uranium.

All commercial reactors breed fuel, but they have low (though still significant) breeding ratios when compared to machines that are traditionally considered breeders. In recent years, the commercial energy industry has been emphasizing high burn fuels, which last longer in the core of the reactor.

Reproduction of fissile fuel is a common feature in reactors, but commercial reactors are not optimized for this feature which is referred to as improved burning. Up to one-third of all electricity produced in the current U.S. reactor inventory comes from reproducible fuel, and the industry is working hard to increase that percentage over time.

The advantages are:

Generates a large amount of electricity

No production of greenhouse gases

Dependence on oil is reduced

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4 0
3 years ago
This organism is a single cell that was isolated from the human body, has no nucleus, and was causing the patient to be ill.
g100num [7]

This organism is a single cell that was isolated from the human body, has no nucleus, and was causing the patient to be ill, in this case is a bacteria.

<h3>What is the concept of bacteria?</h3>

Bacteria are single-celled prokaryotic organisms that are included in the Archaea and Bacteria Domain. Bacteria are fairly simple organisms and belong, according to Whitta's classification of five kingdoms, to the Monera Kingdom.

In this case, Bacteria are prokaryotic and unicellular organisms, that is, formed by a single cell, without a nucleus and with membrane-bound organelles.

See more about  Bacteria at brainly.com/question/8008968

#SPJ1

4 0
2 years ago
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