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Svetlanka [38]
3 years ago
13

Which of the following is the correct sequence of events in the origin of life? formation of protobionts (protocells) synthesis

of organic monomers synthesis of organic polymers formation of DNA-based genetic systems
Biology
2 answers:
Bess [88]3 years ago
8 0
II, III, I, IV

Hope this helps!
MatroZZZ [7]3 years ago
3 0

Answer: the sequence is the next

Explanation:

First exist the synthesis of organic monomers, that’s why are monomers, because it have only one molecule. Then the synthesis of organic polymers, because they reproduce, and it continues being organic. Then, the formation of protobionts, there starts on the cellular formation. And finally the formation of DNA, which is the nuclear base of human life.

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igomit [66]

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If you want a really good study guide for the Calvin Cycle, just follow this link; it helps A LOT!

https://www.khanacademy.org/science/biology/photosynthesis-in-plants/the-calvin-cycle-reactions/a/calvin-cycle

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3 0
3 years ago
What did the earliest vascular plants have
Nastasia [14]

These had no leaves or roots, instead they had green photosynthetic stems which served as both anchors in the ground and photosynthetic surface.

5 0
3 years ago
The lung volume that represents the total volume of exchangeable air is the ________. A. vital capacity B. expiratory reserve vo
olga2289 [7]

Answer:

A. vital capacity

Explanation:

<u>Vital capacity is defined as maximum amount of the air that a human can expel from lungs after the process of maximum inhalation. In other words, its is the volume of the lung which represents the maximum of the total volume which can be exchanged with the air. </u>

It can be measured by using a wet or a regular spirometer. A normal adult has between 3 to 5 litres of VC. Vital capacity of the human depends on the age, sex, mass, height and ethnicity.

5 0
3 years ago
Read 2 more answers
There are no known motor proteins that move on intermediate filaments (IFs).
Harlamova29_29 [7]

Answer: The correct option is E ( Intermediate filaments are unpolarized).

Explanation:

Intermediate Filaments are usually associated with cells that can withstand mechanical stress which includes claws of animals, hair and makes up the dead remnants of the epidermal cell of the skin. Therefore without the supporting network of intermediate filaments, an epithelium remains intact but the cells are prone to damage by abrasive forces.

Intermediate filaments are so named because they are thicker than actin filaments and thinner than microtubules or muscle myosin filaments

The properties or characteristics of an intermediate filaments that explains the lack of motor proteins is as a result of its subunits which are elongated, not globular and are associated in an anti-polar manner. Therefore, the overall filament has no polarity, and therefore no motor proteins move along intermediate filaments

5 0
3 years ago
Which of the following characteristics is directly related to the coding of a single amino acid during the process of translatio
likoan [24]

Answer:

C) the three-base sequence of mRNA

Explanation:

Three-base sequence of mRNA is called codon. One codon specifies a single amino acid. There are 64 codons in eukaryotic cells and three of them are stop codons (non-coding).

tRNA have three-base sequence called anticodon which is complementary to specific codon. During the process of translation codon and anticodon are paired which leads to addition of amino acid to growing polypeptide chain. Newly added amino acid is carried by tRNA.

6 0
3 years ago
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