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bogdanovich [222]
3 years ago
12

The landing of pollen on the stigma is followed by the growth of the pollen

Biology
1 answer:
lorasvet [3.4K]3 years ago
4 0

Answer:

positive chempotesiem

Explanation:

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What process has led to the development of antibiotic-resistant bacteria? a. budding c. natural selection b. selective breeding
Serggg [28]
The correct answer is natural selection. C is the answer!

Bacteria has a stronger resistance that usually produces even more resistant bacteria, and the cycle just repeats itself, making more and more resistant bacteria. This process is called Natural Selection. 
 
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All ponts are on this plz help
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How do observations relate to hypotheses?<br> Check all that apply.
madam [21]

Answer:

observation is what you have gathered, after you look over it you my hypothesis of what you gathered. hypothesis is an explaination of the observation.

6 0
3 years ago
Jill has quite a menagerie of pets and she regularly has to deal with minor animal injuries. So when Johnnie, her rooster, spike
hoa [83]

Answer:

a.) Hydrogen peroxide are highly reactive oxygen compounds used as an antiseptic

b.) Used in treating punctured wounds due to the nature of the wound which helps microorganisms to thrive.

c.) Fizzing associated with hydrogen peroxide use is due to presence of the enzyme catalase.

Explanation:

Hydrogen peroxide is a chemical compound which is made up of two hydrogen atoms and two oxygen atoms. It is powerful oxidizing agent which takes part in biological reactions. This is possible as it can remove electrons from other biological molecules which can damage other cellular components. It is used an an antiseptic to reduce infection because, being a powerful oxidizing agent, it has the ability to react with cell wall of these microorganisms through removal of electrons thereby causing damage to it.

Punctured wounds are narrow in structure which allows obligate anaerobic organisms to thrive because of reduced oxygen flow in the wound. Hydrogen peroxide can effectively eliminate these organisms which are most likely to cause infection in that site because they lack the enzyme called catalase.

Catalase is an enzyme which is present in living cells except obligate anaerobic organisms. It converts hydrogen peroxide into water and oxygen. The fizzing noticed by Jill while cleaning the wound with hydrogen peroxide is due to the catalase in Jill's own cells which converts the hydrogen peroxide to water and oxygen. When oxygen is given off, fizzing reactions are seen at the surface of the wound.

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2 years ago
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The blue whale! It’s actually not only the biggest animal in water but also the biggest animal in the world! :)
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