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never [62]
3 years ago
12

Cell structure _______ is the _______, which controls replication of chromosomes prior to cell division.

Biology
2 answers:
monitta3 years ago
8 0

Answer:

3; Nucleus

Explanation:

photoshop1234 [79]3 years ago
3 0

Answer:

The answer is "Nucleus" and "Center"

Explanation:

Organisms comprise of a large number of cells, however like every other living being, you begun life as a solitary cell. How could you create from a solitary cell into a living being with trillions of cells? The appropriate response is cell division. After cells develop to their greatest size, they partition into two new cells. These new cells are little from the outset, yet they develop rapidly and at last separation and produce all the more new cells. This cycle continues rehashing in a ceaseless cycle.

Cell division is the cycle wherein one cell, called the parent cell, partitions to frame two new cells, alluded to as girl cells. How this happens relies upon whether the cell is prokaryotic or eukaryotic.

Cell division is easier in prokaryotes than eukaryotes on the grounds that prokaryotic cells themselves are less complex. Prokaryotic cells have a solitary roundabout chromosome, no core, and few different organelles. Eukaryotic cells, interestingly, have various chromosomes contained inside a core and numerous different organelles. These cell parts must be copied and afterward isolated when the cell separates.

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The following are the steps for B-cell activation. The steps are in an incorrect order.
Nataly_w [17]

Answer:

4. B cells become activated by interacting with helper T cells.  

1. B cells display antigens in MHC class II receptors on the cell surface.  

2. Antibodies released by plasma cells bind to the antigen so they will be destroyed by other cells of the immune system.

3.B cells rearrange their DNA to create a unique B-cell receptor.  

5. B cells undergo clonal expansion.

6. B cells digest antigens that bind to the antibodies on their surface.

Explanation:

B-cells get activated by interacting with helper T cells when they bind to the antigen to receptors i.e (MHC class II receptors on the cell surface) on the surface of the cell. Series of activities such as release by plasma cells which cause rearrangement of B cells causes the cell to divide and proliferate. The process through which daughter cells arise from a parent cell called clonal expansion.

4 0
3 years ago
What is natural selection
Sati [7]
The process of nature where only the strongest will survive and live on 

Hope this helps
6 0
3 years ago
Someone answer these 2 for me
Sophie [7]

Answer:

F=dominant, 6 fingers

f= reccessive, 5 fingers

Ff= 6 fingers( contains dominant gene)

if you combine Ff and Ff you get:

25% FF (6 fingers)

50% Ff (6 fingers)

25% ff ((5 fingers)

so only 25% will have 5 fingers (normal)

Answer2:

Dominant=normal hearing

Recessive= deafness

If one parent is RR and the other Rr, the offspring will be:

50% RR

50% Rr

so all the offspring will have normal hearing, and there is 0% of deafness.

Hope it helps!!

6 0
3 years ago
1. Where is potential energy in a car kept?
valkas [14]

Answer: The gasoline

Explanation: Gasoline is potential chemical energy because it is only used when the car is in use. It becomes kinetic when the car is on.

3 0
3 years ago
What is the protective insulation that surrounds parts of neurons and speeds the transmission of electrical impulses
yulyashka [42]

Answer:

Mylein Sheath

Explanation:

4 0
2 years ago
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