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natita [175]
2 years ago
7

A plasmid _____________________________ . A. can confer antibiotic resistance to a bacterium. B. is a single-stranded circular D

NA molecule that can undergo horizontal transfer among bacteria. C. is a tool designed in the lab and never found in naturally occurring bacteria. D. always becomes part of the bacterial chromosome during transformation.
Biology
1 answer:
hodyreva [135]2 years ago
7 0

Answer:

The correct answer will be option A.

Explanation:

The bacteria organize its genetic material in the single circular chromosome suspended in the cytosol along with additional circular double-stranded DNA molecule called plasmid.

The plasmid is present as a separate structure in the cytoplasm which performs important functions during stressful conditions in the bacteria like providing antibiotic resistance to the bacteria, formation of filial factors during conjugation and many others.

The plasmid which confers resistant to the bacteria is known as the R-plasmid. The R-plasmid consists of r-determinants which confers antibiotic resistance to the bacteria and resistance transfer factor (RTF) which helps in plasmid transfer.

Thus, option A is the correct answer.

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Alicia is being tickled by her older sister. which divisions of the nervous system are receiving the signals from her sister’s f
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In this case, when Alicia is being tickled  by her older sister, the divisions of the nervous system which are responsible for receiving the signals from her sister’s fingers are called somatosensory cortex and anterior cingulated cortex nervous system. 

When you are touched lightly, the effect of having that ticklish sensation is caused by the analysis of two regions of the brain. For example, when our brain analyses the pressure of the touch, this is the work of the somatosensory cortex. On the other hand, as soon as something touches your skin, the signal sent from the skin's sensory receptors also passes through the anterior cingulated cortex.<span>This is where the pleasant feelings are governed. </span>

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2 years ago
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Which of the following is a method used to prevent soil depletion?
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2 years ago
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Sort the different barriers into their modes of reproductive isolation. A snail with a flat disc-like shell will not be able to
Stella [2.4K]

Answer/Explanation:

Types of reproductive isolation include: temporal, ecological, mechanical, and behavioural.

A snail with a flat disc-like shell will not be able to mate with a snail having a conical shell - this is an example of mechanical isolation, where the animals are physically unable to mate due to incompatible body shapes and sizes.

The reproductive organs of male bush babies do not match with the reproductive organs of females of other bush baby species. - this is another example of mechanical isolation, as the sexual organs will physically not allow reproduction between these species

The mating call of a cricket is not recognized by a cricket of other species - this is an example of behavioural isolation, which results from incompatible mating rituals. I.e. the animals do not respond to each others mating behaviours

The signals sent by a male firefly are not recognized by the female firefly of other species. - this is also an example of behavioural isolation.

Temporal isolation is where species cannot interact because they do not have the same mating seasons or are not active at the same type of day. ?Ecological isolation occurs when two species do not come into physical contact to one another because they access different areas of the habitat. E.g. mating zones, food sources or nesting sites.

8 0
2 years ago
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Cell bodies of sensory neurons may be located in ganglia lying outside the central nervous system. Cell bodies of sensory neuron
AlekseyPX

Answer:

True

Explanation:

Sensory neurons are the neurons present in the nerves which can convert the external stimuli into an electrical signal and can transmit the signals from the organs to the central nervous system.

The structure of sensory neuron in pseudounipolar that is at one end it has dendrites and another end transmits the signals to the CNS. The cell bodies  (nucleus) of these sensory neurons are located in the structures called ganglia located outside the CNS.

Thus, True is the correct answer.

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People who have leukemia, a cancer that affects white blood cells, are often given Cytarabine. This drug inhibits the synthesis
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Answer:

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