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Nastasia [14]
3 years ago
8

He cell membrane forms a protective barrier between the external and internal environments. It is referred to as _______________

____, because it allows some substances to cross more easily than others and blocks other substances from crossing into the cell.
Biology
2 answers:
Ray Of Light [21]3 years ago
8 0

Answer:

Selectively permeable

Explanation:

Vsevolod [243]3 years ago
5 0
It is referred to as a selective semipermeable membrane because it only allows certain things through, due to the size and shape of whatever is trying to get through.
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The genes for sex-linked traits are carried on either the X or Y chromosome. Duchenne muscular dystrophy (DMD) is a recessive, s
morpeh [17]
There is a 50% probability that the child will be a boy. If this is the case, he will inherit the X chromosome from his mother and the Y chromosome from his father. Since the woman has DMD, the boy will certainly inherit the disease, since he only has one X chromosome and it carries the disease. We know that both of the mother's X chromosomes carry the disease because since it is recessive, both of her chromosomes must have it in order for her to have it. 

There is also a 50% probability that the child is girl. If this is the case, she will inherit a normal X chromosome from her father and the disease-carrying X chromosome from her mother. Since the disease is recessive, she will not be affected by the disease, since she has one healthy X chromosome and one disease-carrying one. 

If the child is a girl, there is a 0% chance that she will have the disease (although she will be a carrier). 

If the child is a boy, there is a 100% chance that he will inherit the disease. 

The answer is D)
6 0
2 years ago
Read 2 more answers
Describe the role of matter in living and nonliving things
just olya [345]
Matter is anything that takes up space. Your mass determines how big, or small you are. Or, how big or small something is. Matter is in everything. Even air has matter. Humans are made of matter. Matter makes up atoms, carbon, cells, and everything else you can think of. (Except ideas)
7 0
3 years ago
A color-blind (X-linked recessive) human with Klinefelter syndrome has parents both of whom have normal color vision. 4a. From w
sineoko [7]

The extra X chromosome is received from mother.

<h3><u>Explanation</u>:</h3>

Klinefelter's syndrome is the condition of chromosomal aberration where the person has an extra X chromosome. This means the genotype of the person is 44+XXY and the total chromosome number is 47. This condition is achieved due to inappropriate meiotic division and one of the sperm or ovum has the an extra X chromosome.

Here both the parents are normal in terms of colour vision. So the father cannot have the gene of colour blindness because if it was present, then father would have been colour blind because he has only one X chromosome per cell. So its present in mother who is heterozygous in terms of colour blind gene. So the extra X chromosome also came from her which made the presence of two defective X chromosomes in the offspring and made it colour blind.

5 0
2 years ago
Question 7
Leokris [45]

Answer: 3 2Li (s) + 2H20 (1) ► 2LiOH (aq) + H2 (g)

Explanation: i think thats the answer :/

4 0
3 years ago
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An unresponsive 10-year-old male was struck by a car while riding his bike. He has blood on his face and presents with snoring r
DiKsa [7]
<h2>Performance of jaw-thrust maneuver</h2>

Explanation:

  • The medical emergency services provide medical facilities to individuals. The service can be provided in case of accidents, sudden injury, heart attack, and other medical situations.
  • The individual should provide the emergency first aid that prevents the individual tongue from the obstruction of his upper airways. The maneuver is mainly performed on the supine patient. This first aid provides the proper oxygen in the patient's body.
  • The occluded teeth typically forestall progress ahead of the mandible, and the thumbs must discourage the mentum while the fingers hold mandible and lift it upward. This results in the mandibular teeth projecting before the maxillary teeth (after the mouth opens slightly)

   

4 0
3 years ago
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