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3 years ago

Giving brainliest :}

Biology

1 answer:

ElenaW [278]3 years ago

8 0

humans have 46 chromosomes. the sperm and egg cell carry 23. I don't know the answer to the second im only in 9th grade and everything I answer is from the top of my head SORRYYY

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What is the oldest form of biotechnology? selective breeding hybridization cloning recombinant DNA

taurus [48]

<span>the oldest form of biotechnology is : selective breeding
biotechnology included all kind of efforts that we use to obtain a desired genetic result from the reproduction of a certain organism. In the early years of biotechnology, we still hasn't developed a way to do genetic manipulation, so we do selective breeding to obtain our desired result</span>

6 0

3 years ago

Read 2 more answers

Which two cell structures work together in the

Fed [463]

Answer:

The most appropriate answer would be (3) nucleus and ribosome.

A nucleus is the controlling center of the cell which contains genetic material of the cell that is, deoxyribonucleic acid (DNA). DNA codes for mRNA (messenger ribonucleic acid) which carries the codes for protein synthesis from DNA (nucleus) to the ribosomes.

Ribosome forms the site for protein synthesis in the cell. Ribosome forms the complex around the initiation codon of the mRNA and then moves along the length of mRNA.

As ribosome moves, tRNA (transfer RNA) keeps adding specific amino acids to the growing polypeptide chain according to the codon sequence of mRNA.

Ribosome releases the mRNA and newly synthesized polypeptide chain as soon as it reaches the termination codon of the mRNA.

8 0

4 years ago

Read 2 more answers

35.

d1i1m1o1n [39]

A through C actually tend to increase reactions. Catalysts, increased surface area and increased concentration all tend to do that. But decreased temperature means decreased energy and speed of the molecules/atoms, thus slowing the reaction.

5 0

3 years ago

A) pleural, pericardial, and peritoneal cavities B) perithoracic, peritoneal, and pericardial cavities C) thoracic, pleural, and

andrew-mc [135]

The given question is incomplete the complete question is :

In mammals and some reptiles, the coelom is divided into smaller cavities that enclose the lungs, heart, and gut. What are these cavities called?

A. pleural, pericardial, and peritoneal cavities

B. thoracic, pleural, and pericardial cavities

C. pleural, pericardial, and cardial cavities

D. perithoracic, peritoneal, and pericardial cavities

Answer: Option A

Explanation:

The intra embryonic coelomic cavity forms within the cavity of the lateral plate in the early development ( week 3 or 4 ). This space undergoes a huge morphological change. It does into changes by folding or partitioning when there is a development of the 3 major cavities in the body.

These cavities are known as pleural , pericardial and peritoneal cavities. The single appearing cavity divides the lateral plate into the splanchnic and somatic mesoderm.

Then the later will be divided into the cavities.

4 0

3 years ago

A client with varicose veins asks a nurse what is involved when ligation and stripping are performed rather than sclerotherapy.

Lena [83]

The correct option is this: THE DILATED SAPHENOUS VEINS ARE REMOVED.
Ligation and stripping is a surgical approach to the treatment of varicose veins. The treatment involves the surgical tying of a vein in the leg called the saphenous vein. Stripping refers to the removal of the vein through incision from the groin area or behind the knee.<span />

5 0

3 years ago