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atroni [7]
3 years ago
5

Many procedures suggest that when mutagenizing bacterial cells with UV light, the dish of cells should be shaken gently during t

he actual mutagenesis. Can you speculate on the reason for this? Suppose you are working in a genetics laboratory and want to select bacterial mutants of a certain type. What are the advantages and disadvantages of using UV light as your mutagenic agent?
Biology
1 answer:
Jlenok [28]3 years ago
8 0

When talking about mutagenesis,we take into consideration the shaking of dish of cells in a manner that is gentle inorder to mix the sample with the agar gel so that they will be able to spread on the surface of the agar plate.

This dish is shakes gently so that there will will be oxygen supply and proper aeration.

Below are the advantages of using UV light as a mutagenic agent.

- Using of UV light is very cheap and and there is no need to buy additional equipments or reagents.

- The UV induced mutatins are more likely a natural mutation that is mutation that occurs naturally.

- No specialized training is required to use UV light hence it is a very easy technique and very easy to use.

- To use a chemical poses a great risk but to use a UV lamp is safer as the lamp is generally in a closed box and there is no danger to the researcher example exposure to the researcher.

Below are also the disadvantages of using UV light as a mutagenic agent.

- Sometimes,UV mutagenesis does not give rise to mutants that has the desired phenotype.

- Generation of mutations by UV mutagenesis is in a very random way hence it will generate more than one mutation in a genome.

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Answer:

The population will decrease

Explanation:

The reason it will decrease is that the predators will be able to find the brown mice more easily in the snow then the white mice.

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3 years ago
Which is an important difference between light-dependent (L-D) and light-independent (L-IND) reactions in photosynthesis? The L-
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Answer;

The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH and CO2.

Explanation;

-Photosynthesis is the process by which green plants use light energy from the sun, water and carbon dioxide to make organic molecules, such as simple sugars.

-The process takes place in two phases; light dependent stage and light independent stage.

-During light dependent stage light energy is used to break down water molecules into hydrogen ions and oxygen atoms.

-Light independent reactions uses CO2 and the ATP and NADPH from light dependent reactions to produce sugar/ glucose. ATP is used to provide the energy for sugar synthesis and NADPH is used for electrons in the reduction of Carbon Dioxide into sugar.


6 0
3 years ago
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Fertilization used in which type of reproduction?
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Your answer is sexual reproduction. Sexual reproduction is when two distinct types of reproductive cells known as gametes fuse together, involving female's egg and male's sperm.

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4 0
3 years ago
Stem cells can divide indefinitely and can produce different types of cells, as shown in the model here. A student wants to revi
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3 years ago
The human population has changed in ways that are similar to other populations. How has the human population changed since it fi
kakasveta [241]

The human population has changed since it first appeared on earth as The b. population has generally increased, and at rates that have varied over time.

Humans, as well as other populations, have changed since their appearance on earth. Some populations became extinct as they were not able to cope with the environmental changes whereas other became more adaptable and increased in number over time.

The human population has also increased with the passage of time. However, the increase in the rate of the human population was not a stable one. At some times in the past, the population number declined due to environmental factors such as the eruption of a disease etc.

However, with the passage of time, humans have managed to adapt themselves to the changing environmental conditions and their population is increasing rapidly.

Although a part of your question is missing, you might be referring to this question:

The human population has changed in ways that are similar to other populations. How has the human population changed since it first appeared on earth?

a. The population has generally increased at a relatively constant rate

b. the population has generally increased, and at rates that have varied over time

c. The population increases rapidly until it reaches carrying capacity, where it has remained for thousands of years

d. The population increases rapidly until it reaches carrying capacity, and then decreased at a constant rate

To learn more about human population, click here:

brainly.com/question/24067944

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