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andreev551 [17]
4 years ago
13

1. What were the first living things on Earth?​

Biology
2 answers:
aleksley [76]4 years ago
7 0

Answer:

prokaryotes

Explanation:

sladkih [1.3K]4 years ago
5 0
Prokaryotes that’s the answer
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The population in South Africa is more prone to sickle cell anemia (genotype "ss"). People with genotype "ss" survive only up to
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The answer is stabilizing selection.

<span>Sickle-cell anemia is a recessive disorder caused by the presence of two recessive alleles "s", so genotype is "ss". This disorder is characterized by sickle hemoglobin. In an area with malaria, heterozygous individuals "Ss" (with one dominant allele and one recessive allele) have an advantage. These individuals will have both normal and sickle hemoglobin. But pathogen that causes malaria affect only normal hemoglobin, so heterozygous individuals will have half of the hemoglobin resistant to the pathogen and those individuals are resistant to malaria.</span>

Stabilizing selection favors heterozygotes Ss,  disruptive selection favors dominant (SS) and recessive (ss) homozygotes, while directional selection favors dominant (SS) or recessive (ss) homozygote. Since in this example, people with genotype Ss (heterozygotes) are in advantage, then this is an example of stabilizing selection.

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4 years ago
Which of the following causes the change from day to night? A. the rotation of the Sun B. the rotation of the Earth C. the revol
Svetach [21]
It is the rotation of the earth. when it rotates it causes a cycle of having the sun shine for some time, then the moon. hope this has helped, if did, plz mark as brainliest

7 0
3 years ago
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C is the elemental form of carbon.
Fed [463]

Answer:

All these elements are in living things! And, C6H12O6 is different from carbon, hydrogen and oxygen because it is a compound collected together to create glucose, which is used in plants.

Explanation:

Each molecule C, O, H, are used in all living things to create living compounds. Hope this helps! :)

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3 years ago
Can someone give me 2 single allele traits for animals?
Sveta_85 [38]

Answer:  1. Fur on mammals.  2. Claws on feline creatures.

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What is aseptic technique
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