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nalin [4]
3 years ago
15

What is the smallest unit of organization in an ecosystem

Biology
1 answer:
Murljashka [212]3 years ago
7 0

Organism is the smallest unit of organization.

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Explain how the random alignment of homologous chromosomes during metaphase I
borishaifa [10]

The randomness in the alignment of recombined chromosomes at the metaphase plate, coupled with the crossing over events between nonsister chromatids, are responsible for much of the genetic variation in the offspring. To clarify this further, remember that the homologous chromosomes of a sexually reproducing organism are originally inherited as two separate sets, one from each parent. Using humans as an example, one set of 23 chromosomes is present in the egg donated by the mother. The father provides the other set of 23 chromosomes in the sperm that fertilizes the egg. Every cell of the multicellular offspring has copies of the original two sets of homologous chromosomes. In prophase I of meiosis, the homologous chromosomes form the tetrads. In metaphase I, these pairs line up at the midway point between the two poles of the cell to form the metaphase plate. Because there is an equal chance that a microtubule fiber will encounter a maternally or paternally inherited chromosome, the arrangement of the tetrads at the metaphase plate is random. Thus, any maternally inherited chromosome may face either pole. Likewise, any paternally inherited chromosome may also face either pole. The orientation of each tetrad is independent of the orientation of the other 22 tetrads.

Explanation:

3 0
3 years ago
A nurse will be prepared to administer naloxone (narcan) to a patient who has had an overdose of morphine. repeated doses of nar
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5 0
3 years ago
How do genetic modification variations likely to differ from genetic sexual reproduction variations
ololo11 [35]

Answer:

The  genetic modification variations result in the change in the genome of the organism. In this case, the variations result in expression of a trait in different form than usual. These variations results in genetic mutation, which can be inherited from one generation to another.

In sexual reproduction, the genome of the organism is not altered. In this only an exchange between the maternal and the maternal alleles takes place, these changes does not result in mutations.

You’re welcome :)

5 0
3 years ago
Which of the following macromolecules is not used as an energy source for cellular respiration or fermentation?
professor190 [17]
The answer to your question is c.
5 0
3 years ago
Since the 1970’s, the Earth has been warming. Can this be due to natural, increased solar output? Why or why not?
Margarita [4]
No.

The Sun can influence the Earth’s climate, but it isn’t responsible for the warming trend we’ve seen over the past few decades. We know subtle changes in the Earth’s orbit around the Sun are responsible for the comings and goings of the ice ages. But the warming we’ve seen over the last few decades is too rapid to be linked to changes in Earth’s orbit, and too large to be caused by solar activity.

4 0
3 years ago
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