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dedylja [7]
3 years ago
7

Please help me with this

Biology
2 answers:
Ber [7]3 years ago
8 0

Answer:

uses energy to work

Explanation:

den301095 [7]3 years ago
3 0

Answer:

uses energy to work(?)

Explanation:

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Homozygotes with two sickle-cell alleles are selected against because of mortality. However, heterozygotes for sickle-cell allel
grigory [225]

Answer:

Increased frequency of the allele for sickle cell anemia

Explanation:

Sickle cell anemia is fatal in homozygous genotype. The homozygous genotype having two copies of the allele for sickle cell anemia is not favored by natural selection due to its reduced survival success.

However, the heterozygous genotype for sickle cell anemia with one allele for the disease exhibit malaria resistant. The presence of one allele is not fatal for the organisms as the presence of one normal allele ensures the formation of some normal hemoglobin protein and RBCs to support the oxygen delivery to the body parts.

The increased survival success of heterozygous genotype in malaria-prone regions allowed their natural selection. This increased the frequency of allele for the sickle cell anemia in the gene pool of the local population and increased the frequency of heterozygous dominant genotype.

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3 years ago
Write 2 sentence of what will happen to a plant without water
vladimir1956 [14]

they would die.... the two main things a plant need is water for the turgor to keep the upright and make sure it doesnt wilt and of course for photosynthesis

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3 years ago
The gram stain differentiates between bacteria based on the composition of their.
babunello [35]
The gram stain differentiates two types of bacteria based on the composition of their cell walls. it uses a primary stain, a mordant, a decolorized, and a secondary stain to allow for the visualization of these structural differences.
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2 years ago
Will give brainliest! Scientist were originally skeptical of Wegener's theory of plate tectonics because:
rodikova [14]

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Answer is option 1

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Please mark brainliest this is a scientific answer not a giess

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The Abdominopelvic cavity Hope this helps :)
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