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kipiarov [429]
3 years ago
12

What is the significance of chitin in arthropods? A. Chitin is a storage carbohydrate that forms their exoskeleton. B. Chitin is

a structural carbohydrate that forms their exoskeleton. C. Chitin is a protein that forms their exoskeleton.
Biology
1 answer:
Kay [80]3 years ago
6 0
C is the answer I believe
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at short focusing distances, ciliary muscles contract. what effect do these contractions have on the suspensory ligaments?
True [87]

At short focusing distances, ciliary muscles contract causing the suspensory ligaments to tighten.

The ciliary muscle is an integral muscle of the eye that is constructed as a ring of smooth muscle in the middle layer of the eye, the uvea (vascular layer). It regulates the passage of aqueous humor into Schlemm's canal and governs accommodation for observing objects at different distances.

A suspensory ligament is a ligament that provides support to a body part, particularly an organ. The suspensory ligament protects the fetlock from hyperextension (i.e., falling too low) during exercise. The ligament begins in both the fore and hindlimbs at its connection to the back of the upper cannon bone.

When the ciliary muscle relaxes, its diameter increases; when the suspensory ligaments tighten, the lens becomes thinner. This occurs when concentrating on a celestial object. When the ciliary muscle contracts, the lens becomes much more circular and has more focusing power because the pressure on the zonular fibers is reduced. When the ciliary muscles relax, these fibers contract, pulling the lens out and creating a flatter shape with less focusing power 

For more information on suspensory ligaments, visit :

brainly.com/question/12999415

#SPJ4

6 0
1 year ago
3 points
Eddi Din [679]
Answer: Baseball
Hope this helps!^^
6 0
3 years ago
What is a difference between a waxing crescent and a waning gibbous
slega [8]

Answer:

But what does “waxing and waning gibbous” mean? Rob says crescent is when you can see less than half of the moon illuminated. “Gibbous, you attach that to either waxing or waning when you see more than half of the moon illuminated,” he said. Waxing means it's getting bigger while waning means it's getting smaller.

3 0
3 years ago
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which type of organism moves nitrogen from cells of producers back to the soil. A) decomposers b) consumers c) nitrogen-fixing b
kiruha [24]
The answer is a decomposers

4 0
3 years ago
Who argued that cities brought a more impersonal transitory way of life to people?
slava [35]
The correct answer would be Louis Wirth 
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3 years ago
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