11. Which of the following can be done in the cultivation of plant viruses?
[A] tissue culture
[B] cultures of separated cells
[C] whole plants
[D] all of these
Show Answer
Correct Answer: D [all of these]
Notes:
The cultivation of plant viruses can be done in tissue culture, cultures of separated cells and whole plants.
12. Which of the following is a plant without seed vascular tissue?
[A] Angiosperm
[B] Pteridophytes
[C] Bryophytes
[D] Gymnosperms
Show Answer
Correct Answer: B [Pteridophytes]
Notes:
Pteridophytes are the most primitive vascular plants. It is a simple reproductive system that does not have flowers and seeds.
13. Which of the following does not have a complete cell wall?
[A] blue-green algae
[B] Saccharomyces
[C] sea fan
[D] cyanobacteria
Show Answer
Correct Answer: C [sea fan]
Notes:
Sea fan does not have a complete cell wall. The sea fan is an animal belonging to the phylum Coelenterata. Not all animals have a cell wall.
14. In pteridophytes, which of the following is the dominant generation?
[A] gametophytic
[B] haploid
[C] diploid
[D] triploid
Show Answer
Correct Answer: C [diploid]
Notes:
In pteridophytes, the dominant is the diploid sporophytic generation because it develops from the diploid zygote.
15. Venation is a term used to describe the pattern of arrangement.
[A] Flowers in inflorescence
[B] Veins and veinlets in a lamina
[C] Floral organs
[D] All of these
Show Answer
Correct Answer: B [Veins and veinlets in a lamina]
Notes:
The arrangement of veins and veins on the septum of the leaf is called venation.
16. Which of the following tissue provides strength to the plant?
[A] Intercalary
[B] Parenchyma
[C] Sclerenchyma
[D] Collenchyma
Show Answer
Correct Answer: C [Sclerenchyma]
Notes:
Sclerenchyma provides strength to the plant. It is found in the covering of seeds and nuts, around the vascular tissues in stems and the veins of leaves.
17. In which of the following colour, rate of photosynthesis is maximum?
[A] Red
[B] Blue
[C] Green
[D] Yellow
Show Answer
Correct Answer: A [Red]
Notes:
The rate of photosynthesis is maximum in red colour and minimum in yellow colour. This happens because in the absorption spectrum, the red and blue colour gets absorbed and the majority of green light gets reflected.
18. An anaerobic process in which energy can be released from glucose even when oxygen is not available is called__.
[A] Putrefaction
[B] Fermentation
[C] Glycolysis
[D] None of these
Show Answer
Correct Answer: B [Fermentation]
Notes:
An anaerobic process in which energy can be released from glucose even when oxygen is not available is called Fermentation.
19. __ tissues synthesize natural cytokinins.
[A] Old
[B] Rapidly dividing
[C] Storage
[D] None of the above
Show Answer
Correct Answer: B [Rapidly dividing]
Notes:
Rapidly dividing tissues synthesize natural cytokinins. Cytokinins are produced in actively growing tissues such as embryos, developing fruits, and roots.
20. Pollination where the transfer of pollen between anthers and stigmas of different flowers of the same plant or different plants of the same species is called__.
[A] Self-Pollination
[B] Cross-Pollination
[C] Fertilization
[D] Adoption
Show Answer
Correct Answer: B [Cross-Pollination]
Notes:
Pollination where the transfer of pollen between anthers and stigmas of different flowers of the same plant or different plants of the same species is called Cross-Pollination.
