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Hatshy [7]
3 years ago
15

Describe how the relationship between sickle cell disease and malaria is an example of natural selection in humans in 3 complete

sentences
Biology
1 answer:
Ad libitum [116K]3 years ago
8 0

Answer:

It turns out that, in these areas, HbS carriers have been naturally selected, because the trait confers some resistance to malaria. Their red blood cells, containing some abnormal hemoglobin, tend to sickle when they are infected by the malaria parasite.

Explanation:

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Point of Origin is also known as:
chubhunter [2.5K]

Hi!

I'm pretty sure it is D, point of convergence.

Hope this helps!

5 0
3 years ago
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I'm really confused, how do I friend people?
Likurg_2 [28]

Answer:

Well help them and always support them

5 0
3 years ago
A teacher pushed a 98 newton desk across a floor for a distance of 5 meters in 4 seconds what was his power
IceJOKER [234]
W=98(5)cos(0)
=490J
P=W/t
=490/4
=122.5W
5 0
4 years ago
What part of the rotifer is responsible for crushing food?
frozen [14]

Answer:

Rotifers are specialists at living in habitats where water dries up regularly.

The Monogononta, which have males, produce fertilised 'resting eggs' which can resist desiccation (drought) for long periods.[11]

The Bdelloids, who have no males, contract into an inert form and lose almost all body water, a process known as cryptobiosis. Bdelloids can also survive the dry state for long periods: the longest well-documented dormancy is nine years. After they have dried, they may be revived by adding water. In this, and several other ways, they are a unique group of animals.[12]

Explanation:

The front has a ring of cilia circling the mouth. This gave the rotifers their old name of "wheel animalules". There is a protective lorica round its body, and a foot. Inside the lorica are the usual organs in miniturised form: a brain, an eye-spot, jaws, stomach, kidneys, urinary bladder.

Rotifers have a number of unusual features. Biologists suppose that these peculiarities are adaptations to their small size and the transient (fast changing) nature of its habitats.

8 0
3 years ago
How many covalent bonds can carbon make?
Ostrovityanka [42]

Answer:

4

Explanation:

Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms.

4 0
3 years ago
Read 2 more answers
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