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tensa zangetsu [6.8K]
3 years ago
8

What is a double helix

Biology
2 answers:
KengaRu [80]3 years ago
6 0
A double helix is <span>a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule. or in other words a double spiral.</span>
xxMikexx [17]3 years ago
3 0
Two strands twisting around each other.
This is typically used to describe the structure of DNA.
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The functional and structural unit of the kidneys is the:_______.
serg [7]

Answer: c. nephron

Explanation: The nephron is the functional unit of the kidney, which actively filters blood and generates urine. The nephron is made of the renal corpuscle and renal tubule. Cortical nephrons are located within the renal cortex, whilst juxtamedullary nephrons are observed inside the renal cortex near the renal medulla.

3 0
3 years ago
The first law of thermodynamics is usually written as dq=dw+du. you need to look at the signs carefully; some other disciplines
Bad White [126]
<span>The first law of thermodynamics is follows the quantity dQ = dW + dU where Q is the heat flow, W is the work and U is the internal energy. Only the internal energy is a state function where it means that it does not follow a specific path to arrive at a certain number. Whereas the work and heat are not state functions and they follow a specific path or process in order to arrive at a certain number. An example would be  if y</span>ou are given 2,380 J of energy to do work as 12,900 J and you are to find the internal energy. Apply the equation above:

Q = U + W
2,380 J = U + 12,900 J
U = 15,280J.

6 0
3 years ago
In prokaryotes, the rigid layer of material outside the plasma membrane is a _________.
Anettt [7]
Cell wall. 
Hope this helps!
pls give Brainliest answer!
8 0
3 years ago
Since ammonia is neurotoxic to urotelic organisms, which includes humans, nitrogen atoms can be transported from tissues to the
devlian [24]

Answer:

All the above participate in the ammonia excretion

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The amino groups present in the amino acids are required to form the urea. The ammonia disposal takes place un the liver by the urea formation and is excreted in the kidneys by urine. When free ammonia is produced in peripheral tissues, it is transported to the liver by glucose -alanine cycle, alanine in transported in the blood to the liver, where is converted into pyruvate.  

Another pathway is by glutamine synthase/glutaminase system. The storage and transport of ammonia to the liver is glutamine from glutamate by glutamine synthetase: NH3 + glutamate → glutamine once in the liver glutamine is transformed into glutamate again by glutaminase enzyme: glutamine → NH3 + glutamate.

In the liver takes place the urea cycle, the amino acids transported into the liver can be converted to aspartate. This aspartate enters the urea cycle forming an intermediate of the cycle, and the final product is urea that is excreted by urine.

5 0
3 years ago
Choose 5 different organisms. At least one of your organisms needs to be a plant. List an adaptation and describe how the adapta
spayn [35]

Answer:

1) wood frog - freezes their body in winter

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2) Kangaroo rats survive without ever drinking water.

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3) Chameleon - blend in with the environment by changing its color to escape from predators

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5)Venus fly trap plant that is adapted for living in soil that doesn't provide enough nutrients.

6)  the seaweed is a plant adapted for its underwater environment

6 0
3 years ago
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