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emmasim [6.3K]
3 years ago
8

Which process MUST occur before mitosis and meiosis can occur

Biology
2 answers:
zhenek [66]3 years ago
7 0
<span>Mitosis is the process that facilitates the equal partitioning of replicated chromosomes into two identical groups. Before partitioning can occur, the chromosomes must become aligned so that the separation process can occur in an orderly fashion. The alignment of replicated chromosomes and their separation into two groups is a process that can be observed in virtually all eukaryotic cells. Interfase must happen before mitosis can begin. Interfase is when the parent cell stores energy and becomes bigger so it can make the two daughter cells. </span>
melamori03 [73]3 years ago
6 0
Dna replication <span>MUST occur before mitosis and meiosis can occur</span>
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if you were to watch an individual neurotransmitter molecule just after it was released what would happen to it
Olenka [21]

Neurotransmitter leaves the presynaptic cell by exocytosis. It is released in the synaptic space, and moves to the postsynaptic membrane to meet its receptor. When binding occurs, it triggers a response in the new cell.

-----------------------------------------

Every neuron forms connections with another cell.  

When a presynaptic cell sends information, a neurotransmitter is released.  

After the exocytosis event, this chemical substance travels through the synaptic space forward to the other cell. Once there, it binds to its receptors in the postsynaptic membrane.  

When the joining occurs, the receptor acquires a channel shape. This change allows the ion transference that will make possible the modification of the action potential.  

This binding produces the excitatory postsynaptic potential -depolarization-.

A new action potential initiates in the postsynaptic cell and spreads to the rest of the membrane, depolarizing it.

If the communication between cells needs to stop, the neurotransmitter will be taken out from the synaptic space <em>instead of binding to its receptor. </em>

There are two mechanisms by which the neurotransmitter can be eliminated: by deactivation or reuptake.  

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Related link: brainly.com/question/14693514?referrer=searchResults

                     

6 0
2 years ago
Ammonoids are found in rock layers from six different geological periods. Yet Ammonoids are considered excellent index fossils.
loris [4]

Ammonoids are good as index fossils because of the following characteristics;

<span>1.       </span>Their abundance and vast distribution across most shallow marine waters during the periods

<span>2.       </span>They have easily recognizable features, such as shells and the highly crenulated and complex suture, that are well preserved in rocks

<span>3.       </span>Their rapid evolution that can assist determine changes and variations in the then environment






7 0
3 years ago
How many scientific figures in the number 505900
mote1985 [20]
There are <span>scientific (<span>Result: <span>505900</span> or 5.059e+5 (significant figures: 4, decimals: 0)) </span>figures</span> in the number 505900.
5 0
3 years ago
Can you help me with biology?
Mekhanik [1.2K]

Answer:

I wanna nucleotides

Explanation:

6 0
2 years ago
A recessive gene located on the X chromosome is the cause of one type of colorblindness (denoted by Xc). Let the genotype for no
Alex73 [517]

The scenario will be Son: 25% colorblind daughter: 25% colorblind son: 25% of carrier daughters with normal vision: 25% normal son

<h3>What is color blindness?</h3>

The condition is frequently inherited. Certain eye diseases and medications are also possible causes. Men are more affected than women.

Color blindness is characterized by the inability to distinguish between red and green shades.

A colorblind man's genotype is XcY, and a heterozygous carrier female's genotype is XcX. A cross between XcY and XcX would result in progeny with the following ratio=

Son: 25% colorblind daughter: 25% colorblind son: 25% of carrier daughters with normal vision: 25% normal son.

Thus, the couple is likely to have a son who is half normal and half affected. Similarly, the couple is likely to have 50% normal daughters and 50% colorblind daughters.

For more details regarding color blindness, visit:

brainly.com/question/25621649

#SPJ1

6 0
1 year ago
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