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Art [367]
3 years ago
7

Where does penicillin come from

Biology
2 answers:
Anastaziya [24]3 years ago
5 0
It comes from mold spores from bread
Sindrei [870]3 years ago
3 0
Penicillin was an accidental discovery I believe
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(0)<br> The stage of mitosis depicted in the image is<br> es )<br> A)<br> anaphase<br> B<br> interphase<br> 0<br> prophase<br> D
inessss [21]
Answer:
Prophase
Explain:
The first step in mitosis, the nuclear envelope breaks down and chromosomes condense and become visible.
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2 years ago
Contracts Slowly Striated Voluntary
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Answer:

student 1

Explanation:

The smooth muscles contract and fatigue slowly but are not striated and are innervated by involuntary nervous system. The cardiac muscles are uninucleate and striated. The skeletal muscles are innervated by the voluntary nervous system hence concerned with voluntary movement.

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How do you do punnett squares?
cricket20 [7]
For a punnett squares the F is the dominant gene and the f is the recessive gene



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This is for kids

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3 years ago
How does the polymerase chain reaction make DNA fingerprinting more reliable?
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Read 2 more answers
Hey y'all I need help with this bio question: what are the pros and cons of different skin tones in different parts of the world
d1i1m1o1n [39]
Oh this one is so cool!

It basically all boils down to Vitamin D! We need this essential vitamin to help our body build hormones and regulate calcium. Our bodies make Vitamin D when we are exposed to the UV rays found in sunlight. But as we all know, too much sunlight isn’t good because these UV rays can harm us. Melanin (the chemical that our bodies produce to darken skin tone and hair color) provides protection from UV rays by absorbing them. However, this means that the more melanin that is produced by someone’s body results in less absorption of UV rays and a decrease in Vitamin D production. But for someone living around the equator or in the tropics that doesn’t matter because there’s lots of sun all the time. So for humans living in these areas where there’s lots of sunlight year round, it’s beneficial to have darker skin to protect from the harm of UV rays. People living in these areas still get plenty of Vitamin D though because of that year round sunshine.

Now what about those who’s skin has less melanin, such as those found in the higher latitudes? Well with less sunlight year round, their bodies had to adapt to be able to get enough Vitamin D. So less melanin is produced by the body in order to absorb the lesser amounts of UV rays to make Vitamin D. Lighter skin is, therefore, more beneficial the farther away you go from the tropics.

So essentially:
Pro of Darker Skin tones
-Protection from harmful UV rays

Con of Darker Skin tones
-Less absorption of UV rays and less production of Vitamin D

Pro of Lighter Skin tones
-Greater absorption of UV rays and more Vitamin D production

Con of Lighter Skin tones
-Less protection from harmful UV rays (resulting in sunburns and, in extreme cases, skin cancer)

This is of course the biology answer. The social impacts of different skin tones is a whole different story that you can ask in the history section.
6 0
2 years ago
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