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Serhud [2]
3 years ago
7

The 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:
Murljashka [212]3 years ago
5 0

The answer would be  D) selectively permeable.

nikklg [1K]3 years ago
3 0

The right answer is D) selectively permeable.

Biological membranes only let certain molecules or ions pass, and not at the same speed. This selective permeability is the result of differential passive permeability, which more or less limits the crossing of particles driven by osmotic and electrostatic forces, and biological permeability or permeation, which ensures active transport by enzymatic mechanisms.

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What are some “creatures/animals” that Rex imitates?
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<span>Rex imitates a dog. The lead soldier controls the robot by using simple commands like “stop”, “fetch” and “heel”. It is designed to help the soldiers on operations and missions where it accompanies the lead soldiers from a distance, using the developed technology and patented by IAI. </span>
4 0
3 years ago
Why can carbon form very large molecules?
malfutka [58]

Answer;

(c) It can bond with other carbon atoms that are bonded to other molecules

Explaation;

-Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms, and because the carbon atom is just the right, small size to fit in comfortably as parts of very large molecules.

-Carbon chains can bond with carbon rings to form very large, complex molecules. These large molecules can be made of many small molecules that are bonded together.

5 0
3 years ago
Read 2 more answers
If t=talk and t= short what will be the physical appearance of the offspring in the cross
qwelly [4]

Answer:

If T=tall and t=short, what will be the physical appearance of the offspring in the cross?

Explanation:

It looks like your question is incomplete, so I'll try to fill in the blanks.

The offspring will depend on the parents.  Each parent will need two alleles, so each parent would have to be TT (tall), Tt (tall) or tt (short--this is the only way to have a short individual).

Here are all the possible crosses:

TT X TT  = 100% TT (all tall)

TT X Tt = 50% TT, 50% Tt (all tall)

TT X tt = 100% Tt (all tall)

Tt X Tt = 25% TT (tall), 50% Tt (tall), 25% tt (short)

tt X tt = 100% tt (short)

Note that if there is a T present in the genotype (TT or Tt), that individual will be tall.  The only way to produce short offspring is for the both parents to have a copy of the short allele (t).  

3 0
2 years ago
Which of the following correctly describes the modern six-kingdom classifications?
MArishka [77]
The modern classification is based on a six Kingdom system-

<span>1- Animalia</span>
2- Plantae
3- Fungi
4- Protista
5- Archaea bacteria
6- <span>Eubacteria </span>
7 0
3 years ago
Read 2 more answers
Should you see signs of microbial growth in a sterile medium if you allow it to incubate for several days
frozen [14]

No, even after several days of incubation, you shouldn't detect any symptoms of microbial growth in a sterile medium.

<h3>What is the microbial growth in the sterile medium?</h3>

The deliberate introduction of germs into a sterile growing medium is known as immunization. When there are no living creatures present, a substance is sterile; undesirable bacteria are said to be contaminated. The use of aseptic procedures helps keep growing media from being contaminated. Reduce the amount of time that cultures and growth media are exposed to the outside world. Clean the work area both before and after each use. Avoid breathing or touching the stock cultures or sterile culture media. Before used, loops, needles, pipes, and other items should be sanitized. The tube caps should be held in your hand while inoculating and not placed on the table while using tubes.

Learn more about microbial growth here:

brainly.com/question/14732566

#SPJ4

5 0
1 year ago
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