251. Prokaryotes are considered to be evolved
3.5 billion years ago
1.5 billion years ago
4.5 billion years ago
1000 million years ago
✅ The correct answer is option A.
Biology
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252. Who coined the term Animalcules for microorganisms like Bacteria and protozoa?
Robert Koch
Louis Pasteur
Alexander Fleming
Leeuwenhoek
✅ The correct answer is option D.
253. Wildlife refers to
All plants of the world
All non-cultivated plants
Nondomesticated animals
Both B and C
✅ The correct answer is option D.
254. Flagella might have arisen through the ingestion of
Cyano-bacteria
Spirochetes
Chlamydomonas
Paramecium
✅ The correct answer is option B.
255. Who discovered the bacteria causing tuberculosis and also developed various techniques of media preparation and maintenance of pure culture?
Robert Koch
Louis Pasteur
Alexander Fleming
Leeuwenhoek
✅ The correct answer is option A.
256. Endangered species are
Dangerous for the life of humans
Reduced in number
Already extinct
All of these
✅ The correct answer is option B.
257. Important point/s of Lamarck’s theory
Use and disuse of organs
Inheritance of acquired characters
Natural selection
Both a and b
✅ The correct answer is option D.
258. Which of the following statement is incorrect regarding the germ theory of diseases postulated by Robert Koch?
A specific organism can always be found in association with a given disease
The organism can be isolated and grown in pure culture in the laboratories
The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from the pure culture can do so.
It is possible to recover the organism in pure culture from the experimentally infected animals.
✅ The correct answer is option C.
259. Who developed a theory of natural selection essentially identical to Darwin’s
Hardy-Weinberg
Alfred Wallace
Malthus
Lyell
✅ The correct answer is option B.
260. Which of the following structure is not present in all the bacteria?
Cell membrane
Chromatin bodies
Ribosomes
Capsule
✅ The correct answer is option D.