Biology

Identify semi-autonomous cell organelles

• Chloroplast

• Mitochondria

• Both

• None of the above

Eukaryotic cell differs from Prokaryotic cell in having

• Well defined nucleus

• Endoplasmic Reticulum

• Mitochondria

• Golgi complex

Nucleus was discovered by

10. In 1953 S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from preexisting non-living organic s molecules. The primitive earth conditions created include [NCERT Exemplar]

• (a) low temperature, volcanic storms, atmosphere rich in oxygen

• (b) low temperature, volcanic storms, reducing atmosphere

• (c) high temperature, volcanic storms, reducing atmosphere containing CH4, NH3 etc.

1. Evolutionary convergence is characterised by

• development of characteristics by random mutations.

• development of similar characteristics in different groups of organisms of different ancestry.

• development of dissimilar characteristics in closely related groups of organisms

8. The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because [NCERT Exemplar]

• (a) one organism has given rise to another

• (b) they share a common ancestor

• (c) they perform the same function

7. Analogous organs arise due to [NCERT Exemplar]

• (a) divergent evolution

• (b) artificial selection

• (c) genetic drift

• (a) convergent evolution

9. Appearance of antibiotic-resistant bacteria is an example of [NCERT Exemplar]

• (a) adaptive radiation

• (b) transduction

• (c) pre-existing variation in the population

2. Homologous organs indicate

• (a) convergent evolution.

• (b) divergent evolution.

• (c) adaptive radiation.

who is experienced in the government.(2016)

• trump
• hillary
• both