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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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Autonomic centers in the ________ exert neural control over hormone secretion by the adrenal medullae. a) pineal gland b) pituit
frez [133]

Answer:

The correct answer will be option-E

Explanation:

The autonomic nervous system or ANS activity in the brain is mainly controlled and regulated by the hypothalamus structure. The autonomic centres of the hypothalamus control the hormonal secretion adrenal medulla like adrenaline and norepinephrine.

The secretion of the hypothalamus controls the activity of the vasomotor center which help maintain the blood pressure.

Thus, option-hypothalamus is the correct answer.

3 0
2 years ago
The development of the brain continues past childhood. For example, if a monkey pushes a lever with its finger several thousand
Readme [11.4K]

Answer:

The development of the brain continues past childhood. For example, if a monkey pushes a lever with its finger several thousand times a day, the Brain tissue that controls the finger changes as a result of the experience.

4 0
2 years ago
19. If a scientist needs to use a large dataset to explore how corn grows in different soils, how would this data be classified?
Illusion [34]

<u>ANSWER:</u>

The correct option is B- Qualitative.

<u>EXPLANATION:</u>

When the growth of corn has to be recorded, the quality of the corn grown in different soils needs to be recorded. Qualitative methods are best used to classify quality of anything.

Qualitative data basically is non-numerical data which in the case of corns can be the length of the corn plant, the sweetness of the corn kernel or the hardness or softness of the corn. This data cannot be recorded using numerical values and so other methods of data recording cannot be used.

7 0
2 years ago
Read 2 more answers
An iodine test of a tomato plant leaf revealed that starch was present at 5:00 p.m. on a sunny afternoon in July. When a similar
dimaraw [331]

This reduction in starch content occurred because starch was changed into simple sugars

<h3>Explanation: </h3>

Starch is a polymeric carbohydrate consist of many glucose units linked by glycosidic bonds. The iodine test is used to test for the presence of starch. Starch will change color to an intense "blue-black" colour after the addition of aqueous solutions of the triiodide anion. To do it we can add Iodine-KI reagent to a solution or directly on a potato or other materials such as bread, crackers, or flour The reaction between amylose that present in lesser amounts and iodine is said to account for the intense color change seen.

An iodine test of a tomato plant leaf revealed that starch was present at 5:00 p.m. on a sunny afternoon in July. When a similar leaf from the same tomato plant was tested with iodine at 6:00 am the next morning, the test indicates that less starch was present in this leaf than in the leaf tested the day before. This reduction in starch content occurred because starch was

  • 1. changed directly into proteins
  • 2. transported out of the leaves through the guard cells
  • 3. transported downward toward the roots through tubes
  • 4. changed into simple sugars

Learn more about   starch brainly.com/question/12497961

#LearnWithBrainly

3 0
2 years ago
Read 2 more answers
Vitamin D is an organic molecule that regulates the absorption of calcium by the body. Which of the following elements is most c
Hoochie [10]
The element that is most common in Vitamin D is CARBON.
3 0
1 year ago
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