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deff fn [24]
2 years ago
15

Complete the statement about genetic variation.

Biology
1 answer:
max2010maxim [7]2 years ago
7 0

Answer:

1. Metaphase 1

2. Independent assortment

3. Crossing over

Explanation:

Meiosis is a kind of cell division that reduces the chromosome number of the parent cell by half. It only occurs during sexual reproduction and ensures genetic variation in sexually reproducing organisms.

Meiosis contributes to genetic variability when the chromosomes line up randomly at the cell plate during METAPHASE 1 of meiosis. This process of random alignment is called INDEPENDENT ASSORTMENT of genes. Generally, meiosis is able to ensure genetic variability due to a process called CROSSING OVER. Crossing over is a process whereby nonsister chromatids of homologous chromosomes exchanges/shuffles genetic contents.

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Infinity of biology ​
PSYCHO15rus [73]

Answer:

Origin: L. Infinitas; pref. In- not – finis boundary, limit, end: cf. F. Infinite. See Finite.

1. Unlimited extent of time, space, or quantity; eternity; boundlessness; immensity. There can not be more infinities than one; for one of them would limit the other. (Sir W. Raleigh)

2. Unlimited capacity, energy, excellence, or knowledge; as, the infinity of god and his perfections.

3. Endless or indefinite number; great multitude; as an infinity of beauties.

4. (Science: mathematics) a quantity greater than any assignable quantity of the same kind.

Mathematically considered, infinity is always a limit of a variable quantity, resulting from a particular supposition made upon the varying element which enters it.

5. (Science: geometry) That part of a line, or of a plane, or of space, which is infinitely distant. In modern geometry, parallel lines or planes are sometimes treated as lines or planes meeting at infinity. Circle at infinity, an imaginary circle at infinity, through which, in geometry of three dimensions, every sphere is imagined to pass. Circular points at infinity. See Circular.

Explanation:

6 0
3 years ago
The combination of dominant tree species in Eastern forests will likely change in the future. Some forest types,
Katen [24]

Answer:

<em>C)  Eat locally-produced and organic food; cur meat and dairy consumption.</em>

Explanation:

Eating organic food will be of no help because humans do not usually use forest trees as food resources. And hence, it will be of no help to stop the carbon dioxide emissions. Hence, option C will be of no help.

The consumption of green products will lead to lesser production of carbon dioxide and hence can be helpful. Using alternate energy sources which are not carbon based will also help to reduce the amount of carbon dioxide. If lands are restored then, these trees will not change over time. Hence, option A, B and D are helpful for  no substantial change in the tree species over time.

8 0
3 years ago
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A fish detects vibrations in the water around it by means of its lateral lines, rows of sensory receptors along each side of the
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I know that hair cells, like the ones inside a human ear, are used as well.

6 0
3 years ago
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Photosynthesis by producers right
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Which of the following environmental conditions would be MOST likely to result in transcription of the lac
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Answer:

The correct answer is B high levels of lactose and high levels of cyclic AMP.

Explanation:

Lac operon contain 3 regulatory genes and 3 structural genes.In presence of lactose the repressor molecule that is encoded by Lac I gene cannot bound to the operator region.

        Bacause the lactose interact with the repressor and change its conformation so that it cannot repress the expression of the structural genes of lac operon.

  On the other hand cyclic AMP is a positive regulator of  lac operon .The interaction of cyclic AMP with the promoter region of lac operon stimulates the binding of RNA polymerase in the promoter region to boost the expression of structural genes of lac operon such as Lac Z,Lac Y and Lac A.

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3 years ago
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