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WITCHER [35]
3 years ago
14

The migration of humans into what is today new guinea and australia began about ________ years ago.

Biology
1 answer:
Naddik [55]3 years ago
6 0
It is believed to be 1000 years ago
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How does the nucleus control which proteins are made by the ribsomes
Kobotan [32]

Answer: They receive their “orders” for protein synthesis from the nucleus where the DNA is transcribed into messenger RNA (mRNA).

Explanation: This mRNA travels to the ribosomes, which translate the code provided by the sequence of the nitrogenous bases in the mRNA into a specific order of amino acids in a protein.

6 0
3 years ago
Which statement best describes codominance and incomplete dominanace
Lynna [10]

Answer:

In codominance, two dominant genes express itself in appearance (phenotype). For example, In people with AB blood types, A and B are both dominant genes and both try to show themselves in blood type, which forms third blood type AB.

In incomplete dominance, the organisms with heterozygous genotype (Aa) will have a blended trait instead of showing dominant trait because dominant gene (A) cannot show itself necessarily in appearance (phenotype). For example, when a plant with homozygous red flower (dominant and AA)  is crossed with white flower (recessive- aa), the resulting offspring will all have heterozygous flowers (Aa) and pink (blended), instead of showing dominant trait (red).

Explanation:

3 0
4 years ago
A cell resulting from fertilization of an egg begins to divide. Two cells are formed that normally remain attached and
andre [41]

Each cell that are divided will have complete genetic information itself. So both of them will survive.

Option A.

<h3><u>Explanation:</u></h3>

The sperm and the ovum fuse to form a zygote. This zygote then undergoes cleavage divisions to divide into many cells called morula. Now in the two celled stage, if the cells divide away from each other, it gives rise to monozygotic twins or identical twins.

Both the cell contains nucleus and chromosomes or DNA inside the nucleus. So both of them contains genetic information. Thus both of them survives and develops into two identical twins. This may develop into same amniotic sac or different amniotic sac.

4 0
3 years ago
What's a real life example of a chromosome?
e-lub [12.9K]

Answer:

The "X" or "Y" gene that determines whether you will be a boy or a girl is an example of a chromosome .

Explanation:

5 0
3 years ago
Which has the most direct impact on evaporation in the water cycle?
k0ka [10]

Answer:

O D. ozone depletion.

Explanation:

O D. ozone depletion

5 0
3 years ago
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