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kati45 [8]
3 years ago
12

What happened to our ozone layer?​

Biology
1 answer:
kondaur [170]3 years ago
5 0

Answer:

The ozone layer is still here I believe, it's just slowly going away due to our pollution of the air and such :/

Explanation:

Please vote brainliest!

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Determine the averages of the runners
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Answer:

Jaylyn Fly's average is 11

Suzy Swoosh's average is 10.9

Suhain Sprint's average is 10.4

Explanation:

When you need to find an average, you just need to add the numbers up and then divide by the total number of values you added.

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3 years ago
Summary of climate change
GuDViN [60]
It’s the release of harmful gases e.g. carbon dioxide into the environment due to human activity, therefore causing a rise in global temperatures, which is climate change. Warmer temperatures negatively impact our environment because it causes a decrease in biodiversity, allows more diseases to spread(most live in warmer temp.) and so on.
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3 years ago
1. In the first step in the life cycle of a star, it is called a:
lbvjy [14]
I’m pretty sure it’s c. protostar
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2 years ago
Which of the following does NOT characterize proteins?
8090 [49]

Answer:

The answer is C) They appear to be the molecular carriers of coded hereditary information.

Explanation:

Why NOT C) They appear to be the molecular carriers of coded hereditary information?

This is the job of the nucleic acids. It is composed of nucleotides which are the basic units of DNA and RNA. They carry genetic information about a certain organism.

<h3 /><h3>True of proteins:</h3>

A) They may be denatured or coagulated by heat or acidity.

<u>Denaturation</u> is the <u>destruction of the protein's secondary and/or tertiary structures</u>. The <u>primary structure is not disrupted due to the tough peptide bonds</u> and can only be broken down by acid. For heat denaturation, hydrogen bonds are destroyed, as in cooking of egg whites and medical equipment sterilization.

B) They have both functional and structural roles in the body.

There are many kinds of proteins that have functional and structural roles like hormones <u>(FSH, LH)</u>, antibodies <u>(IgA, IgM),</u> enzymes <u>(lipase, amylase),</u> for storage/transport <u>(hemoglobin, ferritin)</u>, and locomotion <u>(actin, troponin).</u>

D) Their function depends on their three-dimensional shape.

Just like <u>hemoglobin</u>, it's <u>quaternary structure</u> can carry <u>4 molecules of iron</u> in one go. <u>Enzymes</u> are shaped accordingly to fit a<u> specific substrate</u> <em>(lock-and-key model)</em>

6 0
3 years ago
Isovolumetric relaxation and ventricular filling (two phases of the cardiac cycle) take place during __________. view available
jekas [21]
Isovelumetric relaxation and ventricular filling take place during Ventricular diastole.. Both occur during ventricular diastole when the ventricles are not actively contracting and ejecting blood. Ventricular diastole is the period during which the two ventricles are relaxing from contortions of contraction, then dilating and filling; atrial diastole is the period during which the two atria are relaxing, dilating, and filling.
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3 years ago
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