1. Appendages in bacteria help them to stick to their substrate or other bacteri
ID: 210641 • Letter: 1
Question
1. Appendages in bacteria help them to stick to their substrate or other bacteria A) fimbriae B) pili C) flagella D) plasmids 12. A clade is always a group Ajmonophyletic B) polyphyletic C)paraphyletic D) all of these 13. Before using molecular data phylogenies were created by studying physical characteristics of Ajorganisms B) developmental stages C) fossils D) all of these 14. Similarities in Australian mole and American mole are A) homology B) convergent evolution C)divergent evolution D) all of these 15. Nitrogen fixing special cells heterocyst are present in D) actinomycetes A) cyanobacteria B) mycoplasmas C) chlamydias 16. An aggregate of all alleles in a population bs 17. Use and disuse of organs and inheritance of acquired characters was proposed by 18. Which of the following does represent analogous organs? 19. The retention of sickle cell allele in African and Asian populations where malaria is common is A) microevolution B) genome C) macroevolution D) gene pool A) Darwin B)Lamarck CMalthus D) Linnaeus B) hemoglobin of chimp and human C) brain of a cat and a dog D) wing of a bat and arm of h example of-selection A) wing of bat and an in A) balancing 8) artificial C stabilizing D) natural 20. The earth originated aboutbillion years ago A)3.5 B)13.8 )2.7 D)4.6 21. The oldest fossils are-billion years old A)3.9 B)3.1 C)2.1 D)3.5Explanation / Answer
Ans-
11-(b) pili.
12-(a) monophyletic
13-(d) all of the above
14- (a) homology
15-(a) cyanobacteria
16- (d) genepool
17- (b) Lamarck
18-( a) wing of bat
19-(a) balancing
20- ( d) 4.6 billion year.
21-(d) 3.5 billion year.
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