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elena-s [515]
3 years ago
7

Proteins used to determine blood group? ​

Biology
1 answer:
Stella [2.4K]3 years ago
7 0
Antigens determine blood type
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State one role of white blood cells at the site of a wound during the healing of the wound.
kolbaska11 [484]
I stated three answers.
<span>1. White blood cells inundates bacteria that might entered the wound.
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Explain how some substances cross the cell membrane by facilitated diffusion?
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The graph below depicts the frequency of expression of the range of leg lengths in a population of crickets:
Ilia_Sergeevich [38]

The correct answer is option:

The peak of the bell curve has shifted to the right, with a greater frequency of crickets with long legs and a lower frequency of crickets with short legs.

The given condition would lead the directional selection of the crickets with long legs. Directional selection leads to shifting of curve in one direction, which is more suitable.

The crickets with short leg get easily caught by predators, so, after sometime, there would be a decrease in number of the crickets with short leg. At the same time, the crickets with long leg would manage to save themselves and their number would comparatively increased.

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2 years ago
What substance kills Thrax (and most other pathogens)?
kodGreya [7K]

Answer:

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The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-Saharan Africa than among those o
Ivanshal [37]

Ans.

Sickle-cell disorder is a genetic disorder, which shows defected red blood cells, due to mutation in the genes for hemoglobin protein.

Malaria is common in sub-Saharan Africa region and there, natural selection favored gene for sickle cells, because it might be beneficial to people having sickle cell disease that makes them able to survive in such condition and transmit their genes to offspring.

On the other hand, in those Africans, who moved to United States, where malaria is uncommon or absent, natural selection favored normal, wild type genes, resulting in fewer people with defected sickle cell.

Hence,  sub-Saharan African population shows higher percentage of mutated gene for sickle cell as compared to population of United States.

Thus, the evolutionary process behind this difference is 'natural selection.'

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3 years ago
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