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dedylja [7]
3 years ago
10

Choose the correct order of steps for the synthesis of Vitamin D.

Biology
1 answer:
IceJOKER [234]3 years ago
7 0

Answer:D. c, a, b, d

Explanation:humans can synthesis vitamin D as cholecalciferol in the skin when the skin is exposed to ultraviolet-B from the sun.this cholecalciferol is modified to calcidiol in the liver.this calcidiol is then modified to calcitrol in the kidney.parathyroid hormone activates the vit D

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Which DNA fingering technique examines the length variation of DNA repeat sequences in human DNA?
DiKsa [7]

Answer: The question is incorrect, below is the correct question

Which DNA FINGERPRINTING technique examines the length variation of DNA repeat sequences in human DNA?

The correct answer to the question is option D

mtDNA (mitochondrial DNA) analysis

Explanation: DNA fingerprinting technique is a laboratory technique used by geneticists.it entails placing of DNA samples into wells,these wells are then placed in a slab of gels and thereafter passing a current through the gel.This is done to ascertain the uniqueness of a DNA pattern and thus be able to differentiate people of same species.

There are several methods of DNA fingerprinting as outlined in the options given with the question.

In mtDNA (mitochondrial DNA) analysis,The Genetic samples are extracted from the biological materials, these samples extracted are total genomic DNA like hair,tooth or samples of blood, Several copies of these genomic DNA are then produced using a polymerase chain reaction and flanking primers inorder to examines the length variation of DNA repeat sequences in human DNA.

5 0
3 years ago
Would you be able to see a quasar with a naked eye?
Lisa [10]

Answer:

no and yes. If you have a 8- inch telescope on a clear day then yes but if its a foggy and gloomy day out then no

Explanation:

3 0
2 years ago
In 6-8 sentences, explain how stream volume and speed affect the size, shape, and flow of streams and rivers. please help me and
nikdorinn [45]

Explanation:

The speed of water in a stream is affected by the gradient of the geography. The steeper the geography the higher the speed of the water flow and the higher the erosion capacity of the stream. This means the stream will be narrow and deep. There is also less meandering of the stream.

When the gradient is less steep, the stream flow slows down and so does the erosion force it bears especially on the river bed. This therefore result in a higher horizontal erosion than vertical erosion. The steam becomes wide and shallow. The stream is also more likely to meander.

The volume of water in the stream also affects the size, shape, and flow of streams and rivers. A higher volume of water has more erosion power due to the weight of the water column. The stream is, therefore, more likely to be bigger in size than a stream that carries low water volume.  

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7 0
3 years ago
A cell with few energy needs would most likely contain a small number of ___________.?​
vichka [17]

Answer:

Mitochondria

Explanation:

Mitochondria is the site of cellular respiration which produces energy. A cell with few energy needs would therefore contain a small number of this organelle.

4 0
3 years ago
Read 2 more answers
I need help with this WILL BE GIVING OUT BRAINLIEST.
makkiz [27]

Answer:

1. Both Hydrogen should be positive and Oxygen is negative. I can't tell which photo that would represent however my best guess would be #2.

2. D

3. A

4 0
3 years ago
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