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Phantasy [73]
3 years ago
10

How many genes make up the human genome?

Biology
1 answer:
e-lub [12.9K]3 years ago
3 0
The human genome has been estimated to have 20,000 - 25,000 human protein - coding genes. Before it was thought that the number of genes in the human genome was about 100,000, but with better and more advanced gene finding technology, this number has been revised down to the current estimate, and could continue to drop further. The human genome has 23 chromosome pairs with a total of about 3 billion DNA base pairs. There are 22 autosomal chromosomes plus the sex determining X and Y chromosomes, to make 23 pairs.
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3 years ago
Give a well detailed explanation of the given topic. Attach diagrams if possible.
Anna71 [15]
<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2>

Class Crustacea belongs to the Phylum Arthropoda. It is a class itself thus it does not have any subphylum.

<h2>_____________________________________ </h2>

\huge\textbf{Phylum Arthropoda}

Phylums are the groups and Phylum arthropoda is one of the 33 phylas of the Kingdom Animalia. Phylum Arthropoda has the largest phylum of the Animal Kingdom with variety of animals that include one million species. It has 5 classes.

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<h2>_____________________________________</h2>

\huge\textbf{Class Crustacea}

  • They are usually aquatic both marine and freshwater.
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  • Body is divisible into head, thorax and abdomen. Some animals have cephalothorax.
  • Cephalothorax regions are formed by the fusion of head and thorax
  • Head bears two pairs of antenna, one pair of mandible, two compound eyes with stalk.
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                        2)Parasite are, Barnacles and Sacculina.

                        3) Marine are Shrimps, Lobsters etc.

                        4) Sedentary crustaceans are Barnacle(Parasite), Prawns(Fresh-water living) etc.

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />
7 0
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How does single cell organisms maintain stability
lesya692 [45]
Single celled organisms are able to maintain homeostasis, withstanding relatively large alterations in their external environments . This is due to the fact that they posses structures that regulate and carry out life functions. They perform all the functions that are necessary for an organism to exist. The ability to obtain all the substances that are essential for their existence eliminates the need for dependence on other cells. These single-celled organisms are thus able to maintain a relative state of equilibrium within their internal environment.
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