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DiKsa [7]
3 years ago
9

Cells of the immune system are able to respond to the presence of invading organisms because they recognize the?

Biology
2 answers:
tino4ka555 [31]3 years ago
8 0
C DNA pattern in the nuclei of viruses
Akimi4 [234]3 years ago
3 0
A antigens on invadors
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Most proteins destined to enter the endoplasmic reticulum _________. Group of answer choices are transported across the membrane
Svetlanka [38]

Answer:

Begin to cross the membrane while still being synthesized-C

Explanation:

The Endoplasmic Reticulum is a part of the endomembrane system of the cell which is mostly reponsible for the synthesis and modification of proteins, although synthesis of lipids in plant and animal are carried out here

For more synthesis of proteins, it

needs to be further transported into the Rough endoplasmic reticulum- the designated site for secretion after synthesis of proteins.

Also it has been found out that when this proteins enter the Endoplasmic Reticulum, they start to cross the membrane while still being synthesized.

7 0
3 years ago
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A structure within a cell that performs a specific function is called a(n)
Vikki [24]

Answer:

It's an organelle

Explanation:

6 0
3 years ago
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The diagram below shows a particle of food being moved along the human digestive tract by alternative waves of relaxation and co
KATRIN_1 [288]
Peristalsis is the involuntary relaxation and constriction of the muscles of the digestive system which causes the movement of food in the digestive system. This is actually one of the reasons why you can eat upside down, however it is not advisable. 

The answer is PERISTALSIS.

A  Kidney/s: They are bean-shaped organs that filter waste products and urea from the blood. The filtering units of kidneys are called nephrons. Along with water, these waste products and urea are what makes up urine.

B. Ureters - 
These are thin tubes that connect the kidney and bladder. From the kidneys, the urine passes through the ureter down to the bladder. These ureters are just about 8 to 10 inches long. The ureters' walls tighten and relax to prevent back flow of urine. 

C. Urinary Bladder - 
The bladder is a hollow and balloon-shaped. It collects the urine from the ureters. The bladder is held up by ligaments that are attached to the pelvic bones and other organs. The bladder has a sphincter that prevents leakage into the end point of the urinary system. 

D. Urethra
- It is a tube that allows the passage of urine out of the body. Men generally have longer urethras than women. In women, the urethra is about 2 inches long and in men, about 8 inches long. 


4 0
3 years ago
Andi performs the calculation that is shown below.
Sladkaya [172]
The answer would be (A)
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3 years ago
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How is the berries of a mountain ash, the helicopter seeds of maples and linden trees, the parachute seeds of the cottonwood tre
ehidna [41]
Well you see each of the seeds have developed a special technique that allows their individual seeds to travel further and lower the probability of landing close to the tree and not getting the sunlight it needs

For the berries birds and various animals eat them carrying them away so hopefully they can get more sunlight

Helicopter seeds do the same thing except the sides themselves float away from the tree to get  a further distance.

Finally the acorn seeds of the oak tree use the same concept of the berries. Various squirrels do eat these kinds of nuts and bury them in the ground in hopes of finding them later. But due to squirrels not remembering where they buried their acorn seeds the acorns are well away from the tree and start growing. 

So you see all of these tree seeds are specially developed to help it get away from the trees. Especially so that they can grow in a much better environment than the one provided to them initially. 
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