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Sever21 [200]
4 years ago
5

Which type of mutation causes sickle cell anemia

Biology
2 answers:
Licemer1 [7]4 years ago
7 0
It's a mutation of the gene that makes hemoglobin, and causes lots of pain and sickness.
Hope this helps!
IceJOKER [234]4 years ago
4 0

Sickle cell anemia is an inherited form of anemia, a disease that is characterized by inadequate healthy red blood cells to transport an adequate level of oxygen throughout the body.

Normally, red blood cells are flexible and round, and move easily through the blood vessels. In sickle cell anemia, red blood cells become stiff and sticky, and they are sickle-shaped or crescent-shaped. These irregularly shaped cells can get stuck in small blood vessels, which can slow or block the flow of blood and oxygen to different parts of the body.

This disease occurs due to mutations in the HBB gene, located on the short arm of chromosome 11, which encodes the beta-globin protein. This beta-globin is a subunit of hemoglobin which is found in blood erythrocytes.

Hemoglobin allows red blood cells to carry oxygen from the lungs to the entire body. In sickle cell anemia, abnormal hemoglobin causes red blood cells to become stiff, stocky and deformed.

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Which statement explains why earthquakes tend to be deeper near subduction zones?
ICE Princess25 [194]

Answer:

Option C, At a subduction zone, oceanic crust is forced deep into the Earth.

Explanation:

At sub-duction zone, the dense oceanic plates coincides with the less dense continental plates and thus sink below the continental plates. Sometimes these oceanic plates being dense, sink to greater depth with in the earth’s mantle. The sub-duction zone causes  earth quakes of high intensity when oceanic crust penetrates to greater depths of earth crust as they tend to change the rheology of the earths’ mantle and also causes bending of plates

Hence, option C is correct

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3 years ago
Kiko writes a report to compare and contrast the cells of plants and animals. Which of the following statements is accurate and
VladimirAG [237]

Answer:

The correct answer is: Vacuoles in plants are much larger than those in animals.

Explanation:

The cell membrane of animals is not thicker than those in plants. In addition, plant cells have a thick cell wall surrounding the cell membrane that is made of cellulose and provides great protection against osmotic and mechanical stress.

Vacuoles in plants ARE much larger than vacuoles in animals, because plant cells r<u>equire much more water</u> and other substances to function properly. Animals, on the other hand, can ingest water and nutrients through food.

Animal cells DO have chromosomes. Every organism has chromosomes in their cells: prokaryotes have one single circular chromosome, while eukaryotes have many linear chromosomes (humans, for example, have 46 chromosomes).

Plant cells HAVE chloroplasts, as these organelles are crucial, since they participate in the process of photosynthesis - which is fundamental for the nourishment of the plant.

The statement that belongs in Kiko's report is Vacuoles in plants are much larger than those in animals.

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