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
Temka [501]
2 years ago
5

Why is DNA replication necessary in a cell ? why must it be very accurate .

Biology
1 answer:
kvv77 [185]2 years ago
5 0
Because a cell contains only one copy of DNA “program,” it must make another copy before it divides so that each cell can have a copy .
You might be interested in
Your lab group is experimenting with the diffusion of molecules across a membrane. Dialysis tubing is used as a model cell membr
Margaret [11]

Answer: the membrane channel

Explanation:

In passive diffusion, the small water molecules can move across the phospholipid bilayer seen in blue. This layer acts as a semi-permeable or selectively permeable membrane; its hydrophilic heads are attracted to water (seen facing outwards) while its water-repellent hydrophobic tails face towards each other- allowing  molecules of water to diffuse across the membrane along the concentration gradient.

Thus the water will move from an area of high concentration  to an area of low concentration, until the system reaches a steady state called equilibrium- after this, there will be no net movement of water. Similarly via osmosis, the water passes through the membrane due to the difference in osmotic pressure on either side of the phospholipid bilayer this means that the water moves from regions of high osmotic pressure/concentration to regions of low pressure/ concentration to a steady state.

The dialysis tubing mimics a semi permeable membrane; it only allows water and small molecules of iodine to cross into the bag containing starch. The tubing is impermeable to starch;  these large molecules require the aid of protein omplexes called membrane channels, in order to move across the membrane and against the concentration gradient.

5 0
3 years ago
The division of the nucleus known as
insens350 [35]

Answer:

mitosis

Explanation:

5 0
3 years ago
Which applies to an earthworm but not to a hydra?
kow [346]
I think the hydra lacks the specialized cells for touch and chemical detection. On the other hand earthworms have touch, light, vibration and chemical receptors along the entire body surface. Both of them are invertebrates (those animals without a backbone), they include insects, worms, jelly fish, spiders among other animals. 
3 0
3 years ago
WILL GIVE THE BRAINLEST <br><br>Explain why the answer you chose is correct.​
Mademuasel [1]

For one thing based off of process of elimination we know that both plant and animal cells have a cell membrane, and a nucleus. Therefore we are left with cytoplasm and cell wall. According to the question we are most likely looking for something in the animal or plant cell that they don’t have in common with each other. Therefore, the answer is cell wall because an animal cell doesn’t have a cell wall, but a plant cell does. The cell wall can also make it more rigid!

7 0
3 years ago
Where would you go to find black smokers
inessss [21]

Answer:

idk where would you go

8 0
3 years ago
Read 2 more answers
Other questions:
  • The iodine changes color in the presence of
    9·2 answers
  • You are given an earthworm and you are asked to study the internal structure of the earthworm. Which one of the following will y
    14·1 answer
  • The flu vaccine activates adaptive immunity. How does this occur?
    15·2 answers
  • 8. What aspects of the experiment should Victor have held constant?
    9·1 answer
  • E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA
    15·1 answer
  • What is the skeleton of an embryo made of?
    15·1 answer
  • What could you do to support or reject this hypothesis
    15·1 answer
  • The rhythm should be written primarily to fit the mood of the text. O True False​
    7·1 answer
  • Both men and women conceived during the widespread famine of the Dutch Hunger Winter were more likely to be obese by age 5050 an
    11·1 answer
  • The sun's energy arrives as radiation on Earth. When Hector was at the beach, he especially enjoyed the warmth of the sun. Which
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!