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artcher [175]
3 years ago
7

Name the earth’s five major environmental spheres and state the defining characteristics of each

Biology
1 answer:
Ilya [14]3 years ago
3 0
Hi

1. Lithosphere
2. Hydrosphere
3.atmosphere
4. Biosphere

The lithosphere/geosphere is made of the earth's core, the mantle, crust, ocean floor,mountains, sand, etc.The hydrosphere is made of everything water such as oceans, rivers, lakes, rain, and snow.The atmosphere is made of gasses such as oxygen, and hydrogen.Finally the biosphere is all that has life such as plants, animals, people, insects, etc.
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13)
Julli [10]

Multiply 5730 years by 2 since two half-lives have gone by for carbon.

<u>Explanation</u>:

The half-life of a radioactive isotope depicts the measure of time that it takes half of the isotope in an example decay. On account of radiocarbon dating, the half-existence of carbon 14 is 5,730 years  

The half-life of carbon-14 is 5730 years.  

In this manner, after  

1 half-life there is 50 % = 1/2 of the first amount left.  

2 half-lives there is 25 % = 1/4 of the first amount left.  

25% is two half-lives.  

Every 50% of life requires 5730 years.  

So two half-lives require 2 × 5730

6 0
3 years ago
what is the mutation caused by the addition of a nucleotide to an already existing gene sequence called
Harlamova29_29 [7]
The mutation<span> caused by the addition of a nucleotide to an already existing gene sequence is duplication.</span>
7 0
3 years ago
Match the enzymes to their role in the DNA replication process.
Feliz [49]

The correct matching of enzymes and their role in the process of DNA replication is A- 3, B- 5, C-1, D-2 and E-4.

Replication is the process of synthesis of two indentical copies of DNA from a single DNA molecule. It is catalyzed by a set of enzymes with the following function-

A. RNA primase synthesizes an RNA primer (short sequence of RNA) on the lagging strand complementary to the single stranded DNA which acts as template during DNA replication.

B. Ligase is involved in joining the okazaki fragments on the lagging strand together and sealing the nicks of the DNA strand.

C. Helicase separates the two DNA strands at the replication fork.

D. Polymerase synthesizes the complementary daughter strand by adding nucleotides to DNA.

E. Topoisomerase relaxes the highly coiled DNA by creating nick ahead of the replication fork in the phosphate backbone of DNA strands.

4 0
3 years ago
what are density Independent limiting factors? provide examples and describe how they would affect a population.​
MakcuM [25]
A fire is one because it doesn’t matter if zero squirrels are in the forest or none fire will still burn with or without the squirrels
5 0
3 years ago
_____ acts as a messenger between DNA and the ribosomes.
motikmotik
The answer is C. RNA, but it should really by called mRNA for Messenger RNA 
4 0
3 years ago
Read 2 more answers
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