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Vaselesa [24]
3 years ago
13

What does it mean to be immune to a pathogen?

Biology
1 answer:
svet-max [94.6K]3 years ago
3 0

Answer:

It means we have the capability to resist the pathogens and we won't get affected by it easily.

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Which is a monomer of a protein?
borishaifa [10]
Proteins are made of Amino acids so the answer is Amino Acid (C)
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3 years ago
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According to what you have learned about the circulatory and respiratory systems, explain how and why your heart changed its rat
maks197457 [2]

Answer:

Your heart changes its rate depending on the activity, so that it can carry blood to your muscles, and therefore it needs to beat stronger if you are performing some exercise, or not so strong if you are sleeping, for example.

Explanation:

Your heart is continuously beating to keep blood circulating throughout your body.

So, here it is why your heart changes its rate: Its rate changes depending on your activity level; it is lower while you are asleep and at rest and higher while you exercise to supply your muscles with enough freshly oxygenated blood to keep the functioning at a high level.

And how: depending on your activity level, your heart has to pump enough blood to your muscles. Blood carries needed oxygen and other nutrients. Muscles need more blood sugar than any other tissue especially when working hard. To supply your muscles with oxygen your heart needs to beat faster, and this builds up your heart muscles.

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3 years ago
When did Homo sapiens first evolve
vlabodo [156]

Answer:

300,000 years ago

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Why do charged molecules have difficulty crossing a phospholipid bilayer?
jek_recluse [69]
The answer to this question would be because phospholipid is polar has <span>a </span>charge.

Since phospholipid is polar, it can attract molecule with a charge. That will cause the molecule cant move easily pass the membrane. The hydrophobic molecule doesn't have charge, so the molecule can pass through the phospholipid membrane if it small enough.
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2 years ago
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Which activity is an example of a chemical change?
Pavlova-9 [17]

Answer:

An old penny rusting

Explanation:

A penny forming rust is the penny being chemically altered and changing form as opposed to dissolving sugar in water, which is still sugar, just mixed with water. It doesn't change the chemical makeup of the water or sugar.

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