1. Which of the following processes is/are most important for bacterial speciati

Question

1. Which of the following processes is/are most important for bacterial speciation?

a. horizontal gene transfer

b. horizontal gene transfer and natural selection

c. mutation and natural selection

d. mutation and adaptation

2. What would have been the most likely energy-generating metabolism in early cells?

a. exclusively aerobic

b. facultatively aerobic

c. exclusively fermentative

d. exclusively anaerobic

3. Which of the following does NOT lead to variability in the fatty acid profile of an organism?

a. medium composition

b. growth temperature

c. protein content in the sample

d. growth phase

Explanation / Answer

1. Actually all of these processes are important for speciation in bacteria. Speciation is the process in which by the course of evolution new species are formed which are also distinct from the original one. Starting with horizontal gene transfer, it is a process by which genes are transferred from one bacteria to another. It plays a very important role. Suppose if a bacteria is mutated or it has adapted to some new conditions lets say antibiotic resistance, so only way by which its progenies will also be acquiring these characteristics will be by horizontal gene transfer only. Again, natural selection is going to help an organism which is more stable and efficiently capable to the conditions for living. Hence, according to me all of these are important.

2) In early cells the mode of generation metabolism would be exclusively anaerobic, since the environment was reductive ,the oxygen was lacking or very low.

3) Medium composition will not affect the fatty acid profile of an organism since it is to support only normal growth of organism not to make any kind of changes in its body.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.