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topjm [15]
3 years ago
13

There are four steps in bacterial conjugation. The second step is missing in this list

Biology
2 answers:
OleMash [197]3 years ago
6 0
B. After the pilas connection between the two bacteria, the cell wall is nicked, whereby the DNA of one cell is transferred to the other.
Furkat [3]3 years ago
6 0

Answer:

2. The Fusion of cell membranes and transfer of single strand of plasmid DNA of donor cell.

Explanation:

When one bacterium transfers its genetic material through direct contact to others. The bacterium transfers its genetic material called <u>donor cell</u> and one serves it called <u>recipient cell.</u>

There are mainly four steps in this process-

1. Connecting sex pilus to recipient cell by donor cell.

2. The Fusion of cell membranes and transfer of single strand of DNA to the recipient cell.

3. Each bacterium cell makes a complementary DNA strand.

4. Both bacterium cells separates.

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3 years ago
Consulte los tres avances cientificos mas importantes,a traves,de la historia para la humanidad y el por que
tino4ka555 [31]

La respuesta correcta para esta pregunta abierta es la siguiente.

Los tres avances científicos más importantes, a través de la historia para la humanidad son los siguientes.

1.- El descubrimiento de la penicilina.

El científico Inglés Alexander Fleming fue el descubridor de la penicilina en septiembre de 1928. Este descubrimiento revolucionó la historia de la humanidad.. Antes, millones de personas morían debido a las infecciones en el cuerpo humano. La penicilina resultó ser el antibiótico más efectivo descubierto hasta el día de hoy y ha salvado millones de vidas humanas desde su descubrimiento.

2.- El descubrimiento de la electricidad.

¿Te puedes imaginar un día de tu vida sin luz?

Bueno, pues así vivió la gente toda la vida hasta el siglo XVIII, cuando comenzó a entenderse y desarrollar mejores maneras de producir electricidad. Prácticamente todos los aparatos electrodomésticos, de laboratorio, hospitales, en oficinas, escuelas y demás, funcionan con electricidad. Sin ella, nuestra vida no habría producido los avances que conocemos el día de hoy.

3.- El internet.

La revolución de este siglo.

El internet nos mantiene conectados todo el tiempo a cualquier parte del mundo. Con el internet podemos hacer miles de cosas desde nuestras computadoras y teléfonos celulares, que hasta hace 15 años eran inimaginable.

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2 years ago
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Fofino [41]

Answer:D Is the correct answer.

Explanation: All of the options could be the parents of the child with type O blood, because every type of blood has an O type in it.

3 0
3 years ago
Why do scientists believe Neanderthals had some interbreeding with AMHs?
Gelneren [198K]

Explanation:

However, in 2016 researchers published a new set of Neanderthal DNA sequences from Altai Cave in Siberia, as well as from Spain and Croatia, that show evidence of human-Neanderthal interbreeding as far back as 100,000 years ago farther back than many previous estimates of humans' migration out of Africa (Kuhlwilm Dec 11, 2020

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3 years ago
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erastovalidia [21]

Answer:

Number of wolves, and harshness of winter.

Explanation: I took the test

7 0
3 years ago
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