Multiple Choice Questions & Answers on APSC Botany Optional | GkSeries

31 Anomalous secondary growth in Boerhaavia shows
1 formation of extrastelar cambium
2 formation of interxylary cork
3 formation of interxylary phloem
4 formation of successive rings of cambia which develop either in the form of concentric rings or segments

Answer: formation of successive rings of cambia which develop either in the form of concentric rings or segments
32 Which is correct for sapwood?
1 Tyloses are found in them
2 They are darker in colour
3 They are functional in conduction and storage
4 They produce timber of commerce

Answer: They are functional in conduction and storage
33 In dicotyledonous roots
1 pith is large and well-developed
2 secondary growth does not occur
3 number of vascular bundles varies from 2-6
4 number of vascular bundles more than 6 or 8

Answer: number of vascular bundles varies from 2-6
34 Chlorella reproduces only asexually by the formation of
1 autospores
2 biflagellate zoospores
3 quadriflagellate zoospores
4 uniflagellate zoospores

Answer: autospores
35 Chi tin is a
1 polysaccharide
2 nitrogenous polysaccharide
3 lipoprotein
4 protein

Answer: nitrogenous polysaccharide
36 Volvox colonies are found in
1 freshwater ponds
2 salt lakes
3 seawater
4 spring

Answer: freshwater ponds
37 The antibiotic produced by Chlorella is known as
1 chloromin
2 Chloromycetin
3 chlorellin
4 chloramphenicol

Answer: chlorellin
38 Reticulate chloroplast with pyrenoids are present in
1 Oedogonium
2 Ulothrix
3 Batrachospermum
4 Chlorella

Answer: Oedogonium
39 Which of the following is a prokaryotic alga?
1 Polysiphonia
2 Cladophora
3 Anabaena
4 Ectocarpus

Answer: Anabaena
40 An example of colonial coenocytic alga is
1 Spirogyra
2 Oedogonium
3 Hydrodictyon
4 Volvox

Answer: Volvox
41 Oogamous mode of reproduction is seen in
1 Ulothrix
2 Cladophora
3 Chlorella
4 Vaucheria

Answer: Vaucheria
42 Pyrenoids are
1 starch bodies surrounded by protein grains
2 starch bodies surrounded by oil droplets
3 protein bodies surrounded by oil droplets
4 protein bodies surrounded by starch plates

Answer: protein bodies surrounded by starch plates
43 Reserve food floridean starch' is found in
1 Chlamydomonas
2 Polysiphonia
3 Chora
4 Vaucheria

Answer: Polysiphonia
44 Polysiphonia exhibits a special kind of alternation of generations which is called
1 isomorphic
2 haplontic
3 diplontic
4 triphasic

Answer: triphasic
45 The cystocarp in Batrachospermum is
1 haploid
2 diploid
3 triploid
4 polyploid

Answer: haploid