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GarryVolchara [31]
3 years ago
5

The alveoli in the lungs have very thin surface membranes which are often made out of a single layer of cells. The alveoli in th

e lungs are used by the body for the exchange of  _______.
A.
nutrients
B.
energy
C.
gases
D.
liquids
Biology
1 answer:
leonid [27]3 years ago
5 0
The answer would be C. gases 
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Define a chromosome and give more details about it​
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In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.


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Did the enzymes from Claire’s small intestine break down the protein at a low, normal, or high rate? Same for lipids and carbohy
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Given the information available to us through the image provided, we can see that the rate at which Claire's small intestine breaks down the protein, lipids, and carbohydrates is lower than that of a healthy dog.

<h3>What does the graph tell us?</h3>
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  • In each graph, the yellow line is lower than the red, indicating that Claire's enzyme activity is lower than normal.

Therefore, given that the graphs represent claire's ability to break down these substances using a yellow line that appears to be lower than the red line representing a healthy dog through each substance, we can confirm that Claire breaks them down at reduced rates.

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6 0
2 years ago
A segment of dna that codes for the ability to make one type of protein molecule is known as a(n)____________________.
tatiyna
The answer that describes the sentence above in which is a segment of DNA that are being coded in means of making one type of protein molecule is known as the gene. The gene is considered to be a unit that is physical and function responsible for heredity.
7 0
3 years ago
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True or False:
Oduvanchick [21]
True. such as with pesticides, they are used to reduce harmful insects to crops but they often re harmful to the health of people consuming those crops
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Everyone in Smurfette’s family has light blue skin, which is the dominant trait for body color in her hometown of Smurf Valley.
Dmitry_Shevchenko [17]

Answer:

All their descendants will be heterozygous for the skin color, Bb, expressing blue skin.

Explanation:

<u>Available data</u>:

  • Smurfette has light blue skin
  • Her family is a "true bred" or "purebred" line.
  • She married a boy who has light yellow skin
  • blue skin is the dominant trait expressed by the B allele
  • yellow skin is a recessive trait, expressed by the b allele

Cross: Smurfette  x  Husband

Parentals)            BB     x     bb

Gametes)          B   B       b     b

Phenotypes) blue skin     yellow skin

Punnett square)

                       B        B

             b      Bb      Bb

             b      Bb      Bb

F1) 100% of the progeny will be heterozygous for the skin color, Bb

     100% of the progeny will be blue-skinned.

Note: Although the progeny is blue-skinned, they are not true-bred anymore.

7 0
3 years ago
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