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At rest the lens of the eye will be more round when the ciliary muscles are contracted true or false

matrenka [14]

Answer:

True.

Explanation:

Yes, the lens of the eye will be more spherical when the ciliary muscles are contracted due to tension. When the relaxation occurs in the ciliary muscle , the zonular tension is increased, that causes the lens to be flatten and leads to decrease in optical power while on the other hand, when the ciliary muscle contracts, the tension in the equatorial zonular is increased which causes the central lens surface to become more rounded that leads to increases central optical power.

4 0

3 years ago

Describe how our understanding of the structure of the atom has changed over time

vladimir2022 [97]

Answer:

we now know that it is a piece of matter that cannot be split.

Explanation:

7 0

4 years ago

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Trace the flow of energy through a typical food chain (describing "what eats what"), including the original source of that energ

tester [92]

Answer:

The answer is given below:

Explanation:

A food chain consists of producers and different consumers. Producers are the organisms which produces food using sun energy. Consumes directly eats plants or eat other animals to fulfill their energy needs. So, in any ecosystem energy flows through food chain in unidirectionl manner.

Sun is the ultimate source of energy. The producers uses solar energy to make chemical energy (glucose) through photosyntheis. The cosumers use this chemical enegy through food by eating plants. Some animals eat other animals to get energy. The chemical energy stored as ATP (an energy currency).

5 0

3 years ago

Explain the properties of RNA

masya89 [10]

Answer:

RNA forms in the nucleolus, and then moves to specialized regions of the cytoplasm depending on the type of RNA formed.

RNA, containing a ribose sugar, is more reactive than DNA and is not stable in alkaline conditions. RNA’s larger helical grooves mean it is more easily subject to attack by enzymes.

RNA strands are continually made, broken down and reused.

RNA is more resistant to damage from UV light than DNA.

RNA’s mutation rate is relatively higher.

Unusual bases may be present.

The number of RNA may differ from cell to cell.

Rate of renaturation after melting is quick.

RNA is more versatile than DNA, capable of performing numerous, diverse tasks in an organism.

RNA or ribonucleic acid is a polymer of nucleotides which is made up of a ribose sugar, a phosphate, and bases such as adenine, guanine, cytosine, and uracil.

It is a polymeric molecule essential in various biological roles in coding, decoding, regulation, and expression of genes.

Explanation:

5 0

2 years ago

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if both alleles show up or are expressed in cross like roan cattle or calico cats what type of inheritance is it

sineoko [7]

Answer:

This means that the alleles are co-dominant.

Explanation:

However, calico cats are calico for a different reason. The reason calico cats are two different colors is due to something called X inactivation. In females, cells only need one X chromosome, so each cell independently chooses an X to inactivate. The inactivated X chromosome is called a Barr body.

So, the calico pattern appears in female cats because the color gene is located on the x chromosome and depending on which chromosome you inactivate, that cell will express a different color. This is also why you only find female calico cats.

4 0

3 years ago