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Volgvan
3 years ago
5

The outer structure of the neuron is made of a

Biology
1 answer:
Ludmilka [50]3 years ago
7 0

a semipermeable membrane

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Use a Punnett square diagram to show why, for each pregnancy, the chances of giving birth to either a boy or a girl are 50-50. E
ikadub [295]

Answer:

Because the offspring of a male and female are always going to be xx, xx, xy, or xy.

Explanation:

Remember that men have different reproductive chromesomes than women. Women have 2 x chromesomes(xx) while men have 1 x and 1 y(xy). These are given down to their offspring.

So we can write the this out in a punnet square as(link down below).

After you see the visual, you will find that the genotypes are xx, xx, xy, xy.

As I said above, women have sex chromesomes xx, while men have sex chromesomes xy. When you match the genotypes on the punnet square with the ones we know from men and women, we find that two of them match with men and two match with female.

So with this, we can conclude that 2/4 of offspring will always be male and 2 will be female. And as you well know 2/4 is 1/2 which is 50%.

3 0
2 years ago
Which is a possible reason for the transition of algae from unicellularity to multicellularity? A) the transition to multicellul
galben [10]

A possible reason for the transition of algae from unicellularity to multicellularity would be the evolution of multicellularity allowed algae to develop traits that keep them close to the land and thus a source of nutrients. The correct answer between all the choices given is the last choice. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

6 0
3 years ago
A virus kills the host cell and explodes the virus out into the environment. What type of replication life cycle is this
tatuchka [14]

Answer:

Lytic

Explanation:

Brainly deleted my answer? The correct answer is Lytic. The type of replication life cycle is Lytic.

8 0
2 years ago
Jack is seeing an onion cell under a microscope. He observes formation of a cell plate. He is observing which phase of the cell
scZoUnD [109]
The formation of the cell plate (or phragmoplast) is similar to the formation of a cleavage furrow in animal cells, which separates two cells during mitosis and meiosis. Therefore, this occurs during cytokinesis
8 0
3 years ago
A mutation occurs in which a base (T) is inserted into the DNA sequence after the G, at the position marked with an asterisk, be
Zarrin [17]

A mutation which occurs when a base is introduced into the DNA sequence before transcription begins will lead to frame-shift of a single base on the DNA sequence resulting in nonfunctional protein from the transcribed mRNA.

Explanation:

This change either through addition or deletion of a single base in the codon sequences of the DNA will modify the amino acid codes and will result in nonfunctional proteins after transcription.

This mutation will just result in change of a single base, i.e., it would be added either to the enhancer region or the silencer region of the sequence before the promoter which initiates transcription.

The mRNA produced due to mutated DNA sequence after the deletion or insertion point will be read as out of frame thus resulting in nonsense protein.

8 0
3 years ago
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