1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AleksandrR [38]
3 years ago
12

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:
spayn [35]3 years ago
4 0
The cell membrane is semipermeable. 
Bess [88]3 years ago
3 0

Answer: selectively permeable

Explanation:

You might be interested in
12. Study the image of a chromosome. Which of the following statements about
weeeeeb [17]

Answer:

A. Each half of the chromosome is genetically identical.

3 0
3 years ago
Read 2 more answers
How can you use your ears to help you find where a sound is coming from?​
Sliva [168]

Answer:

WELL UMMMMM.....

Explanation:

THERE ARE SOUND WAVES THAT TRAVEL THROUGH THE AIR AND YOUR EAR HEARS SOUNDS FROM THAT SO YAAA

3 0
3 years ago
Read 2 more answers
BRAINLIESTTTT ASAP!!!
Anit [1.1K]
1) Adenosine triphosphate (ATP) is thought of as the "molecular currency" for energy transfer within the cell. Function: ATPs are used as the main energy source for metabolic functions. They are consumed by energy-requiring (endothermic) processes and produced by energy-releasing (exothermic) processes in the cell and Cells store energy in the form of ATP; cells make 36 ATP through cellular respiration.

2) Energy is normally stored long term as carbohydrate, in plants the storage polymer is starch whereas in animals the storage polymer is glycogen. Both of these are formed from the monomer alpha-glucose (C6H12O6). When energy is required by the cell, storage polymers are hydrolysed to yield glucose molecules, which are the starting point of respiration, a series of chemical regions yielding ATP, the universal cellular energy release molecule. 
3 0
3 years ago
Read 2 more answers
Imagine that five hypothetical genes are arranged on a chromosome in the following order: G--H--I--J--K. Which two genes are mos
andrezito [222]

Answer:

G and K

Explanation:

Crossing-over is a genetic phenomenon that occurs in meiosis, specifically, Prophase I. It is when chromosomal segment (genes) are exchanged between non-sister chromatids of homologous chromosomes. Crossing-over occurs only to genes that are UNLINKED i.e. genes located on different chromosomes or far apart on the same chromosome.

This unlinked genes are said to have the highest RECOMBINATION FREQUENCY. Crossing-over allows genes on the same chromosome but far apart from each other, assort independently, which allows alleles to be recombined on the same chromosome. This phenomenon does not occur to genes that are close on the same chromosome as they will be inherited together as a unit.

In this case, G and K are the farthest apart, hence, they will have the highest RECOMBINATION FREQUENCY i.e. the likelihood for homologous crossing-over to take place during meiosis.

4 0
4 years ago
Heavenly bodies that travel around a planet are called satellites or moon which planet has no satellite or moon
IceJOKER [234]

Answer:

i think its A. i dunno if it is btw have a nice day

8 0
3 years ago
Read 2 more answers
Other questions:
  • Name and define the two bacis kinds of reproduction
    9·1 answer
  • Which layer of the uterus undergoes dramatic changes in thickness and structure during the uterine cycle responding to hormones?
    9·1 answer
  • Which statement describes a catastrophe in The Tragedy of Julius Caesar?
    5·2 answers
  • Why do you think that root hairs are produced only on the parts of the root system that have stopped growing?
    15·1 answer
  • What is the medical term for the process or procedure that destroys or inhibits disease-causing microorganisms to prevent infect
    8·1 answer
  • Are the members of the third generation still carriers/affected by the trait? How many
    11·1 answer
  • Can someone pls answer this question
    12·1 answer
  • Explain why we have different seasons.
    15·2 answers
  • Name an abnormal mass of cells that may be cancerous.
    8·2 answers
  • What role does the capsid play in viral reproduction? (1 point)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!