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LuckyWell [14K]
3 years ago
6

Where on earth did life first begin?

Biology
1 answer:
aalyn [17]3 years ago
3 0

Answer:

As of 2017, microfossils (fossilised microorganisms) within hydrothermal-vent precipitates dated 3.77 to 4.28 Gya in rocks in Quebec may harbour the oldest record of life on Earth, suggesting life started soon after ocean formation 4.4 Gya during the Hadean Eon.

Explanation:

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Among the typical midlife changes for men is an Increase in prostate size.

A portion of the fluid that carries sperm during ejaculation is produced by the prostate, a gland. The urethra, which is the tube through which urine leaves the body, is surrounded by the prostate gland.

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4 0
1 year ago
Help me with this please.
defon

Answer:

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5 0
3 years ago
If green is dominant over purple then what is the genotype for this individual
aleksklad [387]

Answer: gg

Explanation:

7 0
2 years ago
Read 2 more answers
In humans, the eye color and hair color genes are located on different chromosomes. Brown eyes (B) are dominant to blue (b), and
Andrej [43]

Answer:

Man's genotype: Bbdd

Woman's genotype: bbDd

First child's genotype: Bbdd

Second child's genotype: bbDd

Explanation:

This is a dihybrid cross involving two genes; one coding for eye color and the other for hair color in humans. The allele for brown eye (B) is dominant over the allele for blue eyes (b) in the first gene while the allele for dark hair (D) is dominant over the allele for red hair (d) in the second gene.

According to the question, A man with brown eyes and red hair will possibly possess genotypes: BBdd or Bbdd while a woman with blue eyes and dark hair will possibly have genotype: bbDD or bbDd. Considering the fact that they produced children with recessive traits for both gene (blue eyes and red hair), it means that they are heterozygous for their dominant trait. This means that the ideal genotype for the man is Bbdd since he will produce gametes containing B and b alleles for the first gene while the ideal genotype for the woman is bbDd since it will produce gametes with D and d allele for the second gene.

Hence, a child with brown eyes and red hair will possess genotype: Bbdd since he/she cannot receive two dominant alleles for the first gene from both parents. A child with blue eyes and dark hair will have genotype: bbDd since he/she cannot receive two dominant alleles of the second gene from both parents.

3 0
2 years ago
The purpose of both mitosis and melosis is to create new cells. Both processes involve the replication of genetic material withi
Marta_Voda [28]

Answer: B or A

Explanation:

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2 years ago
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