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3 years ago

What term is used to describe bacterial cells that can naturally take up dna from their environment?

Biology

1 answer:

Maru [420]3 years ago

3 0

<h2>The correct answer is: Competent cells</h2>

Explanation:

Bacterial cells have the capability of incorporating foreign naked DNA or deoxyribonucleic acid fragments from the environment or the exterior of the cell to the interior of the cell. This process is known as Transformation.
The bacterial cells which are able to undergo transformation are called Competent bacterial cells.
Some of the bacterial cells are naturally competent like<em> Bacillus subtilis, Streptocossus pneumoniae</em> while others like <em>Escherishia coli </em>need to be chemically treated to make them artificially competent.
In natural competence, the foreign DNA from the cell exterior is incorporated into the cell interior through specific protein complexes present in the plasma membrane of the bacterial cells.
In artificial competence, the negative charge on foreign DNA is masked by positively charged calcium ions (so that it is not repelled by the negative charge of the lipid bilayer of the bacterial cell plasma membrane) and then small pores are created in the lipid bilayer of the plasma membrane of the bacterial cells by giving a heat shock to the cells. This results in the uptake of the DNA by the bacterial cells.

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Explain how privatizing endangered species (private ownership) will save them from extinction. Give an example. (approximately 5

-BARSIC- [3]

Answer: The privatization of endangered species will reduce their chances of extinction.

Explanation:

The endangered species are those species which are low in numbers, their population will reduce or extinct in the near future. The privatization of these animals will protect them from dangers of trafficking, predation, habitat loss, and death due to natural disaster. Animals like elephant, monkey, tiger, lion are privatized to protect their extinction.

The trade of hides, teeth, ivory, flesh, horn, and other parts of the endangered animals will accelerate the rate of extinction. Prohibition of trade will allow the agents of trafficking to get chances of killing and stealing animal parts to a large number.

The tragedy of commons suggests that people neglect the well being of the society for personal gain. Those people who exploit the resources from endangered species causing harm to the nature as they are responsible for reducing biodiversity.

6 0

3 years ago

Available energy increases at it is transferred from one organism to another in a food chain true or false

Gala2k [10]

Answer:

"Energy decreases as it moves up trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level. ... A food chain can usually sustain no more than six energy transfers before all the energy is used up." By the way this is from the internet but from what I read it should be false mark brainllest if you want.

Explanation:

8 0

3 years ago

Ranjeet is studying an unknown group of cells and finds that the cells have lysosomes. He concludes that the cell must be an ani

Veronika [31]

No as lysosomes also can be found in plant cells and other organisms.

3 0

4 years ago

The cell's series of tunnel-like membranes functioning in transport and storage are the?

schepotkina [342]

The cell's series of tunnel-like membranes functioning in transport and storage are the Endoplasmic Reticulum.

What are the functions of the Endoplasmic Reticulum?

In both plant and animal cells, the endoplasmic reticulum is a network of tubules and flattened sacs that perform a number of tasks.

The structure and function of the two ER regions are different. Ribosomes are affixed to the cytoplasmic side of the membrane in rough ER. Ribosomes are not linked to smooth ER. The smooth ER is often a tubular network, whereas the rough ER is a collection of flattened sacs.

Rough Endoplasmic Reticulum (RER)

Endoplasmic Reticulum in rough shape. Membranes and secretory proteins are produced in the rough endoplasmic reticulum. Protein synthesis is carried out by translation on the ribosomes affixed to the rough ER. The rough ER generates antibodies in certain leukocytes (white blood cells). The rough ER creates insulin in pancreatic cells.

Smooth Endoplasmic Reticulum (SER)

The production of carbohydrates and lipids is one of many tasks performed by the smooth ER. Cell membranes must be built using lipids like cholesterol and phospholipids. Vesicles that deliver ER goods to various locations also use Smooth ER as a transitory place.

Hence, the correct answer is the Endoplasmic reticulum.

Learn more about the Endoplasmic reticulum here,

brainly.com/question/13474354

# SPJ4

3 0

2 years ago

Identify the spinal cord structure to which herpes virus retreats after chicken pox.

stellarik [79]

The herpes virus infects the humans to cause chickenpox disease. The virus during its stage of causing infection, it spreads through the epidermal cells by infecting them. This causes the typical rash on skin that is seen in chickenpox. The virus then enters that sensory nerves present on the ski and travels along the length of the neurons to the sensory dorsal-root ganglia adjacent to the spinal cord. Here the virus stays in an inactive stage.

4 0

3 years ago