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3 years ago

In conjugation, what structure serves as a bridge between two bacterial cells?

Biology

1 answer:

Wittaler [7]3 years ago

4 0

Answer:

Pilus

Explanation:

Conjugation can be described as one of the processes by which a bacteria transfers it's DNA into another bacteria. In this method of DNA transfer, the donor bacterium cell forms a pilus and joins with the recipient bacterial cell. This allows the DNA from the donor cell to get transferred into the recipient cell. Mostly, the DNA is a plasmid which is transferred. The pilus is formed by the F factor of the donor DNA.

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Ent var

jok3333 [9.3K]

Answer: Oxygen

Explanation:I hope it helps . i have breifly explained it .

Oxygen gas is one of the products of photosynthesis.

Which reactant is the source for oxygen gas and how is it released?

A .

Water, released when sunlight splits it into oxygen and hydrogen ions

B .

Glucose, released when glucose is broken down into carbon dioxide gas, oxygen gas and water

C .

Carbon dioxide, released when sunlight splits it into carbon and oxygen gas

D .

Electrons, released when they strike the chloroplasts

Green plants capture energy and convert it into chemical energy by the process known as photosynthesis. During photosynthesis, carbon dioxide and water are transformed into simple carbohydrates and oxygen is liberated into the atmosphere.

light

6CO2 + 12H2O ----------------> C6H12O6 + 6O2

chlorophyll

Water is also used as a source of hydrogen required for reduction of carbon dioxide to form carbohydrate.

Water is oxidised in presence of light and chlorophyll. Hydrogen is removed from water and oxygen is released as follows:

light

4‎H20 ---------------> 2‎H20 + 4H+ + 4e− + O2

chlorophyll

or,

2‎H2O ----------------> 4H+ + 4e− + O2

Hence the source for oxygen gas is water and it is released when water splits in the presence of sunlight into oxygen and hydrogen ions.

So, the correct answer is 'Water, released when sunlight splits it into oxygen and hydrogen ions'.

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4 years ago

Speciation without geographic isolation is called ________ speciation.

s2008m [1.1K]

The answer is A. Sympatric

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3 years ago

Which effect of temperature rise causes a feedback resulting in a rise in global temperatures?

r-ruslan [8.4K]

Answer:

Explanation:

cause the less the vapor the more the direct heat

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A fetus has been developing for three months. what will happen next apex

NARA [144]

After the third month of development, lanugo develops on the head (thin, first hair), the muscles and bones are formed an shaped, the mouth movement is possible, the liver and pancreas produce fluid secretions, meconium is made (stool of infant), reproductive organs are developed, but the baby's gender is difficult to distinguish on ultrasound.

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What kind of living and nonliving things do you think a marine biologist studies ?

prisoha [69]

Marine biologists study changes in the ocean. so they will look at the chemical composition of deep waters and see how consecrated the oxygen is. They will also study the movements of the plates because when planted move it usually makes new food for deep life

they will also check animal concentrations in certain areas.

Another thing they do is track animal movements. this could be by putting a tracker on a whale or a shark or anything and watching its depths it goes or watching the distance it goes in a day.

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3 years ago

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