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3 years ago

(20 POINTS) What is the difference between haploid and diploid cells, and where are they important exactly?

Biology

1 answer:

Crank3 years ago

7 0

<h2>Answer:</h2>

In our body, cell contains to sets of chromosomes normally.

<h3>Diploid cells: </h3>

Cells having two sets of chromosomes.
They are known as somatic cells.
Formed from mitosis.

<h3>Haploid cells:</h3>

Cells having one set of chromosomes.
They are known as gametes or germ cells.
Formed from meiosis.

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Which statement about atmospheric pressure near earths surface is true

Lena [83]

I will think it’s B.... hope it helps!

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2 years ago

imagine a cell-surface receptor protein is being newly synthesized. How can it get into the membrane that it will ultimately be

motikmotik

Answer:

the steps for a new receptor synthesis:

Explanation:

Do not forget the steps vary from an eukarityc cell to prokarityc one.

IN AN EUKARYOTIC CELL:

1- Transcription: in the nucleus, mRNA is synthesized from the DNA sequence that codifies the protein. Exons are spliced if needed by spliceosomes.

2- From nucleus into cytoplasm: mRNA goes through nuclear membrane into the cytoplasm were ribosomes, substrates for protein synthesis and other organelles are.

3- Ribosomes recognize a signal in mRNA and start reading the genetic code, three consecutive nucleotides at a time and adjust the correspondent tRNAs (tRNAs carry the aminoacids)

4- Peptide bonds are formed between consecutives aminoacids, and a polypeptide is build up according to the mRNA sequence.

5- (The mRNA has a signal that is recognized by the rough endoplasmic reticulum) The peptide goes into this reticulum (RER) and then into Golgi apparatus. (more chemical modifications are made if needed). By this moment the protein has an inserted portion in a lipid membrane.

6- The protein is transported in a vessel that finally fusions with cytoplasmic membrane and the receptor is in destiny. Hydrophobic aminoacid sequences are inserted in membrane.

IN A PROKARYTIC CELL:

1- Transcription (no splicing is needed, there are not exons)

2- There are not nucleus and cytoplasm divided (no transport)

3- Ribosomes recognize a signal in mRNA and start reading the genetic code, three consecutive nucleotides at a time and adjust the correspondent tRNAs (tRNAs carry the aminoacids)

4- Peptide bonds are formed between consecutives aminoacids, and a polypeptide is build up according to the mRNA sequence.

5- The mRNA has a signal that is guides the growing protein to cellular membrane. Hydrophobic aminoacid sequences are inserted in membrane.

8 0

3 years ago

What is the relationship between the pH of pond water and the survival rate of animal species living in the pond?

ser-zykov [4K]

Answer:

D. As the pH decreases, the number of surviving species decreases.

Explanation:

According to the table, there is only one species that survives a ph of 4.0 and 4.5 in the pond, while every ph value above that has multiple species that survive in its condition.

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3 years ago

In 2000, when then-President Clinton along with Francis Collins of the Human Genome Project and Craig Venter of Celera announced

taurus [48]

The millions of sequences were not put up together from their end and had no repeating non-coding sequences.

Explanation:

Celera Venter of Gene Myers started working in collaboration with the Human Genome project which was designed as a revolutionary concept of sequencing of human genome at a large scale. Myers break through the traditional method of sequencing and proposed of an idea of sequencing in a unique way.

He suggested the method of breaking genome copies and then sequencing them together using LINEs. However, the declaration of this proposal by the Human project had certain failures at first as it lacked the non-coding repeating sequence.

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3 years ago

7. Imagine that all nations agreed to reduce greenhouse gas emissions by half in an effort to reduce global warming. In what way

larisa86 [58]

If all nations agreed to reduce global warming then It would be good because the seals need icy conditions. So the less global warming then the more icy habitats there will be and the seals will have more places to live.

Hope this helps

5 0

3 years ago