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Vladimir [108]
3 years ago
6

Who developed the modern model of the solar nebular disk instability model?

Biology
2 answers:
Varvara68 [4.7K]3 years ago
4 0
It would be traced to victor safronov 
Oksanka [162]3 years ago
3 0

Answer:

George Wetherill and Victor Safronov

Explanation:

The modern model known as "solar nebular disk instability model" was developed by George Wetherill after refining the basic modern model developed by  Russian astronomer Victor Safronov in 1970.  According to this model, dust and gases resulted into massive clumps during the early stage of formation of solar system. This model well explains the formation of star, sun, solar system, planet, asteroids and comets.

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why does the meiosis produce cells with only half the amount of DNA? How does this aid in the formation of a healthy zygote?
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Meiosis produces cells (germ cells or gametes) with only half the DNA, or chromosomes, as normal cells (somatic cells). This is called haploid or referred to as "n" number of chromosomes. Normal body cells have doubke that, called "2n," or diploid. For humans our n = 23, so germ cells (haploid) have only 23 chromosomes, while somatic (normal body) cells have "2n" or 46 chromosomes. It is important to only carry half the number of chromosomes or DNA (n), because it is going to combine with another half (n) when sperm meets egg during fertilization. This n + n = 2n restores the diploid number of chromosomes (DNA) in a zygote, the first cell of a future embryo, fetus, and new human being.
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2 years ago
What information on a pedigree can tell you whether a gene is a autosome or a sex chromosome ???
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Answer:

What information on a pedigree can tell you whether a gene is on a autosome or not a sex chromosome? If in a pedigree, the occurrence of the disorder is 50/50 between females and males, then it shows that it is autosomal. If the disorder is mostly shown in males then it is a sex-linked trait.

Explanation:

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3 years ago
2. Which of the following statements describes nonrenewable resources?
borishaifa [10]

Answer:

Nonrenewable resources are never replaced.

HOPE IT HELPS!

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8 0
3 years ago
What pattern do ocean surface currents move in
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While Congress has the power to create new laws, they can be vetoed by the President. In addition, the Executive Branch must enf
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