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Arisa [49]
3 years ago
13

evaluate whether having sickle cell disease would be advantageous or disadvantageous to a person living in central africa

Biology
1 answer:
poizon [28]3 years ago
6 0
It's something to do with the fact that having sickle cell anaemia reduces the chances of contracting malaria, obviously a very common disease in Africa. I'm not quite sure what the link is but hopefully this helps a little bit?
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Is/are used in chronic pain management, to treat attention deficit hyperactivity disorder, and as a treatment for bedwetting. be
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The correct answer is tricyclic antidepressants.

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7 0
3 years ago
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While wading in the ocean, you look down into the water and notice an umbrella-shaped, translucent animal. It swims by pulsing i
PolarNik [594]

Answer:

cnidaria

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the group contains jellyfish which fit that exact description tentacles that sting you with a burning sensation if your skin comes in contact with them

6 0
3 years ago
Pretend that you are a carbon atom. Write a short story (around two paragraphs) that describes your journey through the carbon c
Amiraneli [1.4K]
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4 0
3 years ago
In humans, the quadriceps muscle is a skeletal leg muscle under voluntary control. As such, it contracts in response to signals
Masja [62]

Answer:

The correct answer is - operation of reflex arc.

Explanation:

The reflex arc is a unique and special type of neural pathway that starts with a sensory neuron and ends with a motor neuron. In this operation sensory neuron acts as the receptor and motor neuron is effector. This type of neural circuit helps in faster response.

Voluntary muscles like quadriceps muscle are normally in control voluntarily however, such muscle may contract involuntary due to reflex arc. This type of contraction takes place before the signal has even reached the brain.

In this response the sensory neuron takes the signal to the spinal cord and then motor neuron to the effector muscle for faster response.

Thus, the correct answer is - operation of reflex arc.

8 0
3 years ago
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