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nlexa [21]
3 years ago
8

Next the researchers repeated the experiment in part c but instead of mixing the ax and ay strains, they put one strain on each

side of a glass u-tube. the u-tube contains a glass filter between the two strains of bacteria that prevents the cells from interacting directly. on which type(s) of media would you expect cells from the ay side of the u-tube to grow?
Biology
1 answer:
Nadya [2.5K]3 years ago
5 0
The correct answer is none of the above.

Bacterial cells can transfer genetic material through a process called bacterial conjugation. This process involves the direct physical contact of the bacterial cells and a horizontal gene transfer. The genes which are transferred are most of the times beneficial for the recipient, such as genes for antibiotic resistance.

In this example, bacterial cells cannot have physical contact, since they are separated by a glass filter. Therefore, the bacterial conjugation cannot happen. Given that no gene transfer can be achieved, the AY strain remains bio- trp- and is unable to grow on any medium that lacks bio or/and trp. 
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List several characteristics of class Chondrichthyes that separate it from class Agnatha and class Osteichthyes.
Rasek [7]
The Chondrichthyes are the cartilaginous fishes including the sharks, rays,<span>skates and chimeras. The Osteichthyes are the bony fish. Both of these groups </span>became established during the Devonian Period about 400 million years ago. The Chondrichthyes <span>differ from the Osteichthyes in many respects, including their</span><span>

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5 0
3 years ago
A stream or river that runs into another stream or river is called a​
Maksim231197 [3]

Answer:

tributary

Explanation:

A tributary is a river that runs into another river.

4 0
3 years ago
Que efecto tiene la masa en la velocidad de la difusión?
Over [174]

Answer:

Masa de las moléculas que se difunden: las moléculas más pesadas se mueven más lentamente; por lo tanto, se difunden más lentamente. Lo contrario es cierto para las moléculas más ligeras. Temperatura: Las temperaturas más altas aumentan la energía y por lo tanto el movimiento de las moléculas, aumentando la velocidad de difusión.

Explanation:

¡Espero que ayude!

8 0
3 years ago
Some desert beetles can live without ever drinking liquid water. They survive on "metabolic water," which is water formed during
anygoal [31]

Answer:

Metabolic water is a water obtained from eating other organisms.

Explanation:

Water is a by product that is gained in the process of cellular respiration. In respiration process, food molecules are broken down in the mitochondria of the cell for generating energy in the form of Adenine tri phosphate (ATP). With this ATP, water and carbondioxide is also produced. Carbondioxide is removed from the body while water is used in different processes. So desert beetle takes water from eating food substances.

4 0
3 years ago
Please help with this biology question
polet [3.4K]

Answer:

A

Explanation:

A is right

I think. But I am not 100 % sure

4 0
3 years ago
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