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Dmitriy789 [7]
3 years ago
13

What is a covalent bond​

Biology
1 answer:
iris [78.8K]3 years ago
5 0

A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms.

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The half life of C14 is 5730 years. I have a sample that I dug up from a sea cucumber fossil. I expected .00015ppm of C14 in my
Tju [1.3M]

Answer:

The answer is 17190 years

Explanation:

Original amount was 5730. To become 1/8 of the original amount, three (3)  half life periods will demand because after first half life the amount will become 1/2 and after second half life, amount become 1/2 again (1/2 x 1/2 = 1/4).  Third half life, the amount become half 1/2 again (1/2 x 1/2 x 1/2 = 1/8).

For the 3 half life periods we have original amount x numbers of half life periods = 5730 years x 3   =  17190 years

8 0
3 years ago
What eats annual flowers?
brilliants [131]
Earwigs, slugs, and snails eat annual flowers out of gardens.
4 0
4 years ago
Fever results from the stimulations of the hypothalamic thermoregulatory center by: A prostaglandins B granuloma C opsonin D All
FrozenT [24]

Answer:

A prostaglandins

Explanation:

Fever is the abnormal body temperature that is caused by pyrogens.Pyrogens  are the chemicals produced by pathogen. Fever is protective mechanism of body to fight against pathogens. It is actually the immune response that spread to whole body with elevated temperataure. The elevated temperature helps to deal with pathogen more efficiently.

The interleukins released be immune cells in response pyrogen ultimately lead to release of prostaglandin E2. Prostaglandin E2 reset the hypothalamus thermoregulation. The hypothalamus feels the body temperature is cool although how high is the body temperature.

8 0
3 years ago
Identify two ways in which genes can be recombined during meiosis?
Karolina [17]
Well one is independent segregation of maternal and paternal chromosomes and another is crossing over 
4 0
4 years ago
Why is genetic editing a bad thing?
Lady_Fox [76]

Answer:

Although it has some good effects it can also harmfully reduce human diversity and increase social inequality majority of genetic editing is pretty bad.

It probably shouldn't even be allowed because it can cause risks to future children, creating new forms of discrimination. This can also make people lose their trust in science technology.

New toxins can be produced, Gene Transfer to Wild or Weedy Relatives, change in Herbicide Use Patterns. There are most Unkown harms yet to be discovered.

8 0
2 years ago
Read 2 more answers
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