1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zhuklara [117]
3 years ago
15

If the bacterium Staphylococcus aureus experiences a cost for maintaining one or more antibiotic-resistance genes, what would ha

ppen in environments that lack antibiotics?
a)The number of genes conveying antibiotic resistance would increase in these bacteria

b)These genes would be maintained in case the antibiotics appear.

c)These bacteria would be outcompeted and replaced by bacteria that have lost these genes.
Biology
1 answer:
Gnesinka [82]3 years ago
7 0

Answer:

c)These bacteria would be outcompeted and replaced by bacteria that have lost these genes.

Explanation:

The genetic traits that make the organisms better adapted to the prevailing conditions are favored by natural selection. These traits should increase their fitness in terms of survival and reproduction. On the other hand, the genetic traits which reduce the fitness of organisms are not favored. If these genetic traits are not required by organisms under the prevailing conditions, they are lost over generations.

If a bacterial species experiences reduced fitness due to the presence of antibiotic resistance genes, the bacteria without the gene would be increased in the population under the conditions of the absence of antibiotics in the environment.

You might be interested in
What following organisms is considered to be an exception to the cell theory
Mars2501 [29]
A virus, because it has a non-cellular structure.
3 0
4 years ago
In maize, a dominant allele A is necessary for seed color, as opposed to colorless (a). Another gene has a recessive allele wx t
Gelneren [198K]

Answer:

  • 1/2 Aa Wx wx (colored seeds, normal starch)
  • 1/2 aa Wx wx (colorless seed, normal starch).

Explanation:

  • A (colored seed) is dominant over a (colorless)
  • Wx (normal starch) is dominant over wx (waxy)

Both loci are independent.

A <em>Aa WxWx </em>individual was test crossed (crossed with a homozygous recessive <em>aa wxwx</em> individual).

  • The homozygous recessive can only produce <em>a wx </em>gametes.
  • The dihybrid individual can produce two types of gametes, all of them with the same frequency because the genes segregate independently: 1/2 <em>A Wx </em>and 1/2<em> a Wx </em>

<u>The possible offspring resulting from the combination of those gametes is:</u>

  • 1/2 Aa Wx wx (colored seeds, normal starch)
  • 1/2 aa Wx wx (colorless seed, normal starch).

7 0
3 years ago
How would you describe the population growth of a typical developed country?
never [62]
I believe the answer is <span>D. High birth rates and low death rates leading to a expanding population. i am not positive but i am pretty sure</span>
4 0
3 years ago
1: How does sea-floor spreading occur? A, New materials are being added to the asthenosphere.
marin [14]
1. <span>D. Molten material beneath Earth's crust rises to the surface.

2. </span><span>A. The mid-ocean ridges
(This is asking for what form. The Andes is a mountain range in Peru)

3. </span><span>C. Subduction causes the ocean floor to sink into deep ocean trenches.
(Subduction is when part of the ocean floor sinks under a deep-ocean trench and return the the mantle; this is caused by the movement of tectonic plates)

:)
</span>
4 0
3 years ago
The protein coat that surrounds the genetic material of the T2 phage is termed the:______
tiny-mole [99]

Answer:

Th correct answer is A. Capsid

Explanation:

T-2 phage is a bacteriophage which is virulent to E.coli which means T2 phage infects E.coli. The genetic material of T2 phage is linear DNA which is double-stranded. The genetic material of T2 phage is enclosed in a protein coat which is called capsid.

This capsid protects the genetic material of bacteriophage by any enzymatic digestion, helps the virus to attach the host cell and helps the virion to penetrate the cell membrane of the host cell and inject its genetic material in the host cell. Therefore capsid is the correct answer.

5 0
3 years ago
Other questions:
  • What is the connection between natural capital, natural income, and an
    6·1 answer
  • When actively growing cells are treated with taxol, they often are unable to complete the cell cycle. based on what you have lea
    8·1 answer
  • A population of rabbits follows the typical pattern of inheritance and the law of dominance for fur color. B is the allele for b
    10·2 answers
  • Where does fertilization occur
    7·1 answer
  • Eric follows a vegetarian eating pattern, and he wants to know whether he needs to take any vitamin and mineral supplements. wha
    11·1 answer
  • Natural selection can lead to the formation of a new species which is called
    9·2 answers
  • Explain how scientific study is always an ongoing process?
    7·1 answer
  • What is a main function of fats in the body?
    6·2 answers
  • Anabolic steroids are used to build muscle mass quickly. Why are they called “anabolic?”
    11·2 answers
  • Place the steps of the respiration process in the correct order.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!