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ICE Princess25 [194]
3 years ago
8

I need help with both. plz help asap

Biology
1 answer:
Shkiper50 [21]3 years ago
6 0

Clear because there is the sun

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Some bacterial cells are resistant to a variety of antimicrobials because they actively pump the drugs out of the cell.
ad-work [718]

True. Some bacterial cells are resistant to a variety of antimicrobials because they actively pump the drugs out of the cell.

A significant resistance mechanism in Gram-negative bacteria is drug efflux. It expel solutes from the cell. Antimicrobials and metabolites are just a few of the hazardous compounds that Efflux pumps help bacteria remove from their interior environments so they can regulate it.

The main efflux systems in Gram-negative bacteria are members of the RND superfamily and typically consist of an outer membrane protein channel, a periplasmic protein, and a cytoplasmic membrane pump. The most common example is  MFS (such as Bmr and Blt in Bacillus subtilis) and the ABC transporters.

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2 years ago
New, inheritable characteristics can result from...
sergejj [24]
New, inheritable characteristics can result from the recombination of genes during meiosis and <span>mutations in the genes found in sex cells. The correct option among all the options that are given in the question is the first option. I hope that this is the answer that has actually come to your desired help.</span>
4 0
3 years ago
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Stone and brick used as exterior siding needs _______________, while vinyl is _______________ and can be attached directly to th
Ber [7]

In contrast to vinyl, which is lightweight and can be affixed directly to the framing, stone and brick need support when used as external siding.

<h3>Why do people frame works of art?</h3>

The way we experience art can be greatly influenced by the frames. They can be crucial in safeguarding the artwork in addition to improving how it looks. Some frames may even increase the value of the art that is displayed inside them.

<h3>What Is a Frame?</h3>

Art that has been framed has been mounted inside of a picture frame, usually behind glass. Fine art, art prints, antique posters, photographs, or any other piece of artwork can be protected against UV rays, water, dust, and scratches by framing.

<h3>Describe framing.</h3>

The arrangement of visual components in an image or layout in relation to the primary subject is known as visual framing.

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6 0
1 year ago
Which of the following mutations could lead to constitutive expression of the genes of the lac operon? View Available Hint(s) Wh
Molodets [167]

Options for part A are as follows:

A) A mutation in the operator sequence

B) A mutation in the lac-Z gene

C) A mutation in the lac-Y gene

D) A super repressor mutation

Answer:

The correct answer:

Part a - A mutation in the operator sequence

Part b - It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part C. true.

Explanation:

part a:

If there is a mutation in the operator sequence leads to prevent binding of the repressor which leads to allowing constitutive expression of the genes various conditions.

part b:

The biological role of the lac operon makes sure that the cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part c:

RNA polymerase cannot transcribe the structural genes due to the repressor binds to the lac operator, therefore, the proper function of the lac operon is possible when the placement of the operator sequence between the promotor and the structural genes.

4 0
2 years ago
In the summer, the arctic fox appears brown
Nadya [2.5K]
The color change is most likely due to the effect of "<span>(3) environmental conditions on gene expression" All these changes have to do with what will keep the fox alive for the longest amount of time. </span>
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