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sergij07 [2.7K]
3 years ago
12

These maps show changes that occurred between 2006 (left) and 2015

Biology
2 answers:
Vikki [24]3 years ago
7 0

Answer:

The hole over antartica has gotten smaller

Explanation:

butalik [34]3 years ago
4 0

B. The hole in the ozone layer over Antarctica got bigger.

Explanation:

Using the bar scale in the map, we can vividly see that the hole in the ozone layer over Antarctica got bigger. The reduction in the intensity of the blue color in the 2015 suggests that there has been an appreciable decrease in the ozone cover over Antarctica.

  • Ozone layer is in the stratosphere and it prevents harmful ultraviolet rays from reaching the earth surface.
  • Over the the years, the increasing use of chlorofluorocarbons in aerosols, as refrigerants have led to a surge in the depletion of this layer.
  • From the imagery shown on the map, in 2006, we can vividly see a very thick blue cover over Antarctica.
  • In 2015, the cover is gone.

learn more:

Ozone in the upper atmosphere brainly.com/question/12685482

#learnwithBrainly

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Why is herbivores insect is least common?
marshall27 [118]

Most insects are herbivores in a stage of their life, but most of the time later on they because omnivorous (plant and meat eater) so therefore they don't stay herbivorous for long. Also, most herbivorous insects get eaten quite often.

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3 years ago
According to the ____________ theory of biological aging, dna in body cells is gradually damaged through spontaneous or external
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The Cross-Linkage Theory or also referred to as the glycosylation theory of aging was discovered or proposed by Johan Bjorksten in the 1940s. According to this theory, the aggregation of cross-linked proteins can damage cells and tissues this slowing down the bodily processes that eventually results to aging. In recent studies, cross-linking is associated with age-related changes in the studied proteins. Furthermore, this theory stresses out that the binding of glucose to proteins can cause various problems. Once the said binding occurs, the protein becomes impaired which leads to its performance inefficiency. Living a longer life would also mean increasing the possibility of oxygen-glucose meeting and protein. Some of the known cross-linking disorders include senile cataract and the appearance of tough, leathery, yellow skin.

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3 years ago
Determine the averages of the runners
Leona [35]

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Jaylyn Fly's average is 11

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Explanation:

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3 0
3 years ago
What are three examples of matter besides water that are transported through ocean currents
ololo11 [35]
Matter is anything that has mass. everything has matter, even the air.
7 0
3 years ago
.
Softa [21]

Answer:

The five steps of DNA replication are (1) DNA unzips, (2) complementary bases come in, (3) the sugar-phosphate backbone is constructed, (4) the backbone bonds to bases and bases bond to each other, and (5) the bases are proofread.

<h2>The process of DNA replication.</h2>

You may thus remember that your cells produce enzymes as catalysts to carry out activities. Your cells turn on an enzyme called DNA helicase for DNA replication. Your DNA is grabbed by the helicase molecule, which then gently unravels and unwinds the entire DNA molecule. Another group of enzymes known as DNA polymerase follow behind it as it moves.

There are also free-floating nucleotides present in your cell. Normally, your cell utilizes them to build RNA for communications, but now the DNA polymerase enzymes take them up and assemble them into new DNA. If the polymerase tries to insert the incorrect nucleotide, it won't fit since each nucleotide can only ever link to its matching nucleotide (A->T, G->C), which stops the process. Another nucleotide is taken after discarding the erroneous one. The leading edge is created in this manner.

Another enzyme, which should be mentioned, primes the nucleotides with phosphate groups that the polymerases grasp onto and then discard when the nucleotides are integrated into at the DNA strand.

It becomes a little trickier with the lagging strand. The polymerase will move in the same direction as the helicase on one side because the polymerases can only move in one way (5'-3'), but it cannot move in the opposite direction on the other. The open DNA on that side is instead read by a different enzyme known as DNA primase (there are many of them), which then synthesizes RNA segments that are identical. A different polymerase converts the RNA primer to DNA, followed by a third enzyme (DNA ligase) that joins the ends of those DNA segments to create the new whole DNA from the lagging strand. This process starts with one polymerase using the primer to attach and build DNA in the opposite direction of the helicase.

The two new complete sets of DNA are therefore formed from the leading and lagging strands. The other half is composed of the old DNA that was divided in half, while the first half is entirely new and formed of free nucleotides.

The process by which your cells divide then involves bundling up the DNA, dividing, and a whole bunch of other things.

<h3>Little more info that might answer some extra questions:</h3>

The primase is not what puts the extra phosphate groups onto the loose nucleotides. As far as I'm aware, that's part of their construction. Those phosphate groups are what provides the energy for the polymerase to attach them to the DNA strand, after which they're discarded to be picked up and reused later to build more nucleotides. The nucleotides themselves are made with a different series of enzymes.  Suffice it to say, enzymes are like tiny molecular robots in a factory using chemical reactions to build what your cell needs, each enzyme responsible for one of the often many reactions needed. The process for constructing nucleotides is over my head, but it boils down to a series of enzymes putting molecules together and changing their shape.

What primase does is construct the RNA primers that the polymerase fuses to the DNA strand to become the other half of that side of the DNA.

The lagging strand isn't smaller, it's just being constructed in the opposite direction from the way the DNA is being unzipped by the helicase. Typically, you picture DNA like a twisted ladder, but that's not quite right. The reason it has the twist has to do with the structure of the base pairs. The two chains of the DNA run opposite from each other. If you're looking at it like a ladder, one side is "upside down". The helicase starts unzipping from either end of the DNA strand, but for one side of the DNA it's unzipping 3'-5', and for the other side it's unzipping 5'-3'.

The polymerase only constructs DNA going from the 5' end to the 3' end. For half the DNA, this works perfectly fine - it follows merrily along behind the helicase as it unzips the DNA strand. As each base pair separates, the polymerase just pops a new base onto the half it's attached to. For the other half, though, from its perspective the DNA is getting unzipped 3'-5', which is opposite the direction the polymerase can go. It can't follow behind the helicase. Instead, primase comes in and builds RNA segments in the 5'-3', "backwards" from the helicase, giving the polymerase something to grab and go the direction it wants to go.

6 0
1 year ago
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