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Marizza181 [45]
3 years ago
8

Which factor is an abiotic factor of an aquarium ecosystem?

Biology
1 answer:
MariettaO [177]3 years ago
5 0

Answer:

I would say, depth.

Explanation:

Hope this helps!

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Which best defines homeostasis? modifying the external environment maintaining a stable internal environment controlling what en
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maintaining a stable environment controlling what enters and exits the cell movement of materials into the cell

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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
Some plant cells have cell walls, while other plant cells have a cell membrane
dimulka [17.4K]

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False, all plants cells have cell membrane, in addition most of them have also cell wall. They have both

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