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amm1812
3 years ago
12

Which was the original source of atmospheric oxygen? Question 4 options: autotrophs cooling of Earth’s crust formation of the oc

eans volcanoes
Biology
1 answer:
Nuetrik [128]3 years ago
5 0

Answer:

The answer is autotrophs

Explanation:

During the early days of the Earths life there was no oxygen but there was plenty of CO2 which the autotrophs took and used as food while discarding the excess which was the oxygen.

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During DNA replication, an open section of DNA, in which a DNA polymerase can replicate DNA, is called a replication fork. 2. Ok
Fiesta28 [93]

The question has been answered itself but the answer will contain the detail explanation.

Answer:

1. The replication fork formation during DNA replication is important for the continuity and the addition of the further base pair on the template. The DNA initiation process starts by the formation of replication fork.

2. The okazaki fragments are the short DNA fragments that are formed on the lagging strand. These fragments are later joined by the enzyme DNA ligase.

3. Leading strand is the continuous strand that formed during the DNA replication. The direction of the leading strand is 5' to 3' .

4. DNA polymerase is the main replicating enzyme during the DNA replication process. Different types of DNA polymerase with multiple subunits are present in prokaryotes and eukaryotes.

5. The new DNA that are formed from the parental strand and complementary with each other are called daughter DNA.

3 0
3 years ago
An investigator attempting to replicate Pasteur's swan-necked flask experiment has boiled a hay infusion for 1 hour. However, sh
blsea [12.9K]

Answer:

Hay infusion refers to an amalgamation that can be formed by taking samples from different sources like rivers, lakes, ponds, and others. It is one of the best procedures that can elevate the density of the bacteria cell at any specific time interval.  

In the given case, even after boiling hay infusion for one hour, growth was observed in the flask after one day. It can be due to certain factors like the hay infusion may have been comprising some endospore, which is resistant to heat or may comprise some kinds of bacteria that can withstand high temperatures.  

Because of which, even after heating the infusion for one hour, it did not get influenced by the heat and got the chance to grow when it got optimum temperature again at the time when the sample was left as such.

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4 years ago
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xz_007 [3.2K]

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Biofuels for me are the easiest to study

5 0
3 years ago
Bill the explorer was hiking through the Brazilian rainforest when he came upon a strange, new organism which had yet to be clas
inn [45]

Answer:

Bill should classify the organism as a bird.

Explanation:

It would be right for Bill to classify the newly discovered organism as a bird. This is because the birds are a category of animals which have feathers as well as hollow bones. As for the flying criteria, not all birds belonging to this category can fly. For example, ostrich and kiwi cannot fly but yet still belong to the category of birds, Hence, this newly found organism can be classified into birds as it has feathers and hollow bones.

3 0
3 years ago
In order to maintain a stable internal environment, the cells of all living organisms must be able to
xenn [34]

Answer:<em> Living organisms must maintain a constant internal environment while living in a constantly changing external environment. </em>

Explanation: Maintaining the internal environment is important because the processes that keep the cell alive can only take place under certain conditions. There are different processes that occur in the body to maintain the constant internal environment such as diffusion, osmosis, homeostasis, active transport, passive transport, endocytosis, exocytosis, etc. Homeostasis helps to maintain an equilibrium of an internal environment.

4 0
3 years ago
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