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elena55 [62]
3 years ago
10

How do bacteria help humans?

Biology
1 answer:
natulia [17]3 years ago
7 0
The answer is D. Bacteria are used to make virus vaccines
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kari74 [83]

Carbon and Hydrogen atoms share an electron pair, forming covalent bonds special properties of carbon is ability to form double and triple bonds.

<h3>What is molecule example?</h3>

A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all of the substance's physical and chemical properties. Further atom division occurs within molecules.For instance, each atoms the particle of oxygen are represented by the letters Oh and Water vapour, together.

<h3>How a molecule is formed?</h3>

When ionic compounds come together and form bonds with one another, a molecule is created. Each atom shares an electron when a bond is formed between them. A molecule is created as a result of a covalent bond.

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3 0
1 year ago
Why flowers have more stamen than pistil?
lesantik [10]
This is what i know:
Flowers usually have more stamen because they need to ensure that there is enough pollen to fertilize the seeds from the pistil.
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5 0
3 years ago
What is the principle for dating materials using radioactive isotopes
nevsk [136]

It is based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.

<h3>How are isotopes used in radioactive dating?</h3>

These isotopes decay within the rocks according to their half-life rates, and by choosing the fit minerals and measuring the relative amounts of parent and daughter isotopes in them, the date at which the rock crystallized can be determined.

Thus, It is based on a comparison between the observed abundance of a naturally occurring radioactive isotope.

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5 0
2 years ago
A(n) ________ fracture occurs in the vertebrae after severe stress, such as when someone falls and lands with a significant amou
Helen [10]
A compression fracture <span>occurs in the vertebrae after severe stress, such as when someone falls and lands with a significant amount of force. This occurs when the block-like part of your vertebrae becomes depressed or collapses. This can also occur when bones are weakened, which is commonly seen in older people. </span>
5 0
3 years ago
Match the 4 factors that affect Natural Selection to each example:
Maru [420]

Answer:

Correct answers are:

a - 1.

b - 2.

c - 4.

d - 3.

6 0
3 years ago
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