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frutty [35]
3 years ago
7

In which section of the nephron does the filtrate have a higher osmolarity than the blood when it enters and lower osmolarity th

an the blood when it leaves?
Biology
1 answer:
Liula [17]3 years ago
7 0
I believe it is the ascending loop of henle. In the ascending portion, the loop becomes impermeable to water and instead the cells of the loop, actively reabsorb the solute; thus water is not reabsorbed but ions are readily reabsorbed. As the ions are reabsorbed the concentration becomes more and more hypotonic until it reaches 100-150 mOsm/L. Therefore, the ascending loop is called the diluting segment of the nephron due to its ability to dilute the fluid in the loop from 1200 to 100 mOsm/L.
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You determine that you have only three copies left of an important DNA fragment, so you decide to amplify it. Using flanking pri
kicyunya [14]

Hello. This question is incomplete. The full question is:

"You determine that you have only 3 copies left of an important DNA fragment, so you decide to amplify it. Using flanking primers, how many PCR cycles would you have to run to generate over one billion (10^9) copies of the fragment? "

Answer:

Approximately 29 cycles of PCR would be required.

Explanation:

As you may already know, PCR is a technique used in molecular biology that allows part of a DNA molecule to be recycled into millions of copies.

PCR allows this replication to be done through cycles. Each PCR cycle lasts about 2 minutes and allows the DNA molecule to undergo the separation of the strands, the binding of the primers and the synthesis of new DNA strands through DNA polymerase. This cycle is usually repeated 32 times, but this number may change depending on the number of copies the researcher thinks is necessary.

In this case, if a researcher wants 10 ^ 9 copies of DNA, he must do the following calculation to find the number of PCR cycles needed:

32 ^ x = 10 ^ 9

x = 28.3 = approximately 29 cycles.

4 0
3 years ago
When sediments deposit in lakes or oceans, how do they lay?
Alenkinab [10]
It depends on the weight of the sediments.
6 0
3 years ago
Read 2 more answers
Select the correct answer.
Marizza181 [45]

Answer:

Option D, the "biological ladder"

Explanation:

The food chain is the network of organism in which all are dependent on each other for their food, energy source and survival.  

The circle of life depicts the time frame starting from origin of a life form till its death and the intermediate stages.

The tree of life basically determines which organism has evolved from which other organisms.  

The biological ladder represents the development of species from simple form to a much complex form.

Hence, option D is the right metaphor

4 0
3 years ago
Discuss how fossils provide evidence of change from the earlest life-forms to those alive today
alekssr [168]
The earliest forms would be plants and other life like that, and current day would be mostly humans and animals and a lot of plants are disappearing
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Invasive species always have a negative impact on an ecosystem. <br><br> A) True <br> B) False
Ganezh [65]
i think false because they can help with another animal and there population decrease
8 0
3 years ago
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