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olga_2 [115]
3 years ago
12

Blood cells are _____ in shape because they lack a nucleus.

Biology
2 answers:
sesenic [268]3 years ago
8 0


Red blood cells are disc shaped. It is thought one factor that allows them to have this shape is because they do not have a nucleus. This tends to increase amount of space inside the cell for hemoglobin.

They have a flexible disc shape which helps increase the surface- to- area volume ratio  which enables oxygen and carbon dioxide to diffuse across the red blood cell's plasma membrane more readily.

Their disc shape also enables them to squeeze through tiny capillaries that are half their size .


igomit [66]3 years ago
3 0

Answer:

The correct answer is CONCAVE because they don't have a nucleus. I just took the test!

Explanation:

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Proteins that are involved in packaging the eukaryotic chromosome into "beads" called __________ are __________.
Brilliant_brown [7]
<span>Proteins that are involved in the packaging of eukaryotic chromosome into "beads" called nucleosome are histones.</span>

 A nucleosome is a segment of DNA wound in sequence around eight proteins called histones. Together the DNA and the histones form  "beads"
A nucleosome is the basic unit of DNA packaging in eukaryotic cells.



5 0
3 years ago
Most of the worlds deserts are located at latitudes where
icang [17]

Most of the worlds deserts are located at latitudes where cold, dry air moving toward the poles descends.

E) cold, dry air moving toward the poles descends.

<u>Explanation:</u>

A large portion of the world's deserts are situated almost 30 degrees north scope and 30 degrees south scope, where the warmed tropical air starts to drop.

Hot deserts are essentially found around the Tropics of Cancer and Capricorn. As air moves inland, it gets drained of dampness and precipitation drops. So the majority of the world's deserts are situated at scopes where cool, dry air advancing toward the shafts slides.

4 0
3 years ago
Need answer quick please thanks
Lady bird [3.3K]

Answer:

The genotype will be: Bb

4 0
3 years ago
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Which tissue layer of a woody stem contains active xylem?
Marat540 [252]
The answer is cambium
4 0
2 years ago
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Uncle Billy likes to drink alcohol, smoke cigarettes, and eat in a lot of fast food restaurants (McDonalds, Wendys, Pizza, etc).
77julia77 [94]

Answer: Eating a diet high in saturated fats, trans fats, and cholesterol has been linked to heart disease and related conditions, such as atherosclerosis. Also too much salt (sodium) in the diet can raise blood pressure. Not getting enough physical activity can lead to heart disease.

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7 0
2 years ago
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