<u>Answer:</u>
Scientist think colonies of Cyanobacteria called stromatolites were responsible for the introduction of oxygen into earths atmosphere is true.
<u>Explanation:</u>
- In primeval earth’s atmosphere, stromatolites (colonies of Cyanobacteria) are believed to have increased the level of oxygen by their photosynthesis process.
- These are the first known organisms that started photosynthesis process and produced the oxygen to the earth’s atmosphere.
- There is a theory that, these organisms produced oxygen in the environment and the organism disappeared that couldn’t live in the atmosphere with the oxygen.
- Scientists gave this a name called as “great oxygenation event”.
Answer:
e) An agent, such as a plasmid, used to transfer DNA from an in vitro solution into a living cell.
Explanation:
A cloning vector is a naked DNA that can be maintained and into which a foreign DNA can be inserted. A vector needs to be small in size, have restriction sites for endonuclease enzymes and the ability to multiply and express itself at a high rate, without disrupting the host cells machinery. Perfect cloning vectors are DNA molecules from viruses, plasmids and bacterial species such as E.Coli.
Answer:
I don't know
Explanation:
I'm don't know this question answer for this
Answer:
C 6 H 12 O 6 + 6 O 2 --> 6 CO 2 + 6 H 2 O + ATP is the complete balanced chemical formula for cellular respiration.
Cricket is said to be a multicellular organism and not a unicellular organism.
<u>Explanation:</u>
- The cell is said to be the functional and structural unit of every living organism. In this, some organisms possess a single cell while others consist of multicellular or many cells.
- Unicellular are the organisms that are known to possess only a single cell. Whereas multicellular organisms consist of many cells.
- In the unicellular organisms single cell is responsible for the total function of that organism whereas in multicellular animal each group of cells possesses a different function as they do the specific action for the body.
- Cricket is said to be the insect similar to a grasshopper that belongs to the Arthropoda family.
