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Bas_tet [7]
2 years ago
10

Describe and draw the prokaryotic and eukaryotic cells. What are the main similarities and differences?

Biology
1 answer:
xxMikexx [17]2 years ago
5 0

Answer:

Both organisms are composed of cells, the basic unit of life, with each cell surrounded by a cell membrane. The biggest difference between prokaryotes and eukaryotes is that eukaryotes have a nucleus. They also have other membrane structures called organelles

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HELP ASAP!!!! All life on earth has descended from a common ancestor this theory was accepted when
kap26 [50]

Answer:

A. A majority of scientists agreed with it

Explanation:

The famous theory called the theory of common descent, states that all the living organisms of the earth have arisen from a common ancestor. This notion was first proposed by a French mathematician,Louis Maupertuis duirng 1740s who was of the view that all organisms had a single ancestor and evolutionary process with the passage of time resulted in the specie diversification.

After that, in 1790s another philosopher Immanuel Kant, suggested that all organisms seem to have a common ancestor. In the same period of 1790s, another scientist , Erasmus Darwin who was the grandfather of Charles Darwin also suggested that all the organisms might have a single ancestor who went through the process of evolution to bring all the majesty into life.

Charles Darwin was the first scientist who worked on this notion for alot of time and proposed the theory of common descent,in his book, On the Origin of Species.

After it, many scientists got agree with this theory such as,  Vernon Kellogg in 1907 and T. Ryan Gregory in 2008 and many others explain that no reliable observations exists which contradicts the theory of common descent.

Therefore, option A is the best option.

Hope it helps!

4 0
3 years ago
"Explain the statement that both Archaea and Bacteria have the same basic structures, but these structures are built from differ
timurjin [86]
<h2>Importance of Archaea And Bacteria </h2>

Explanation:

  1. Microscopic organisms contain peptidoglycan in the cell divider.
  2. Archaea do not.Explain the explanation that the <em>two kinds, microbes and archaea</em>, have a similar essential structures, yet worked from various synthetic parts.
  3. The archaea and two microbes have cell films and the two of them contain a hydrophobic bit.
  4. The two microorganisms and archaea have a cell divider that ensures them. it is made out of peptidoglycan, though on account of archaea.
  5. The two microscopic organisms and archaea have diverse Ribosomal RNAs (rRNA).
  6. Archea have three RNA polymerases like eukaryotes, yet microorganisms have just one. Archaea have cell dividers that need peptidoglycan and have films that encase lipids with hydrocarbons as opposed to unsaturated fats.
  7. The two microscopic organisms and archaea have diverse Ribosomal RNAs (rRNA).
4 0
3 years ago
When does DNA synthesis occur?
SashulF [63]

Answer:

In the S Phase

Explanation:

This is because chromosome duplication occurs in this which is similar or the same to DNA synthesis

8 0
2 years ago
Glucagon is a hormone that is released when the level of glucose in the blood is low. Glucagon uses a G protein signaling pathwa
allsm [11]

NOTE: the steps of the signal transduction pathway to be arranged is in the attached file.

Answer:

The correct signal transduction pathway in order from the releasing of glucagon into the blood to the promotion of glycogenolysis includes:

- Glucagon binds extracellulary to G- protein coupled receptor.

-G protein releases GDP and binds FTP

-Activated G protein activates adenylate (adenylate) cyclase.

-Adenylate cyclase converts ATP to cAMP.

-Cyclic AMP activates protein kinase A

- phosphorylase kinase phosphorylates glucogen phosphorylase, an enzyme needed for glycogenolysis.

Explanation:

As carbohydrates from food consumed is digested, it's end product, the glucose, is assimilated into the cells for energy production through the help of insulin in a process called glycolysis. Excess of glucose is stored in the liver as GLYCOGEN.

In cases where there is reduced sugar in the blood (hypoglycemic state) another pathway (known as glycogenolysis through

GLUCAGON hormone) is initiated to elevate the concentration of glucose in the blood.

7 0
3 years ago
Finger like projections called villi occur in the
MrRa [10]
Villi occur in the digestive system, helping to move food through your system and absorbing nutrients. 
6 0
3 years ago
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