11. Chromosome Theory of Inheritance was proposed by __?
[A] Pier Antonio Micheli
[B] Louis Pasteur
[C] Stephen Hales
[D] Thomas Hunt Morgan
Show Answer
Correct Answer: D [Thomas Hunt Morgan]
Notes:
The chromosomal theory of inheritance, or the idea that genes are located on chromosomes, was proposed based on the experiments of Thomas Hunt Morgan.
12. Which of the following causes chloroplasts to be green?
[A] because they contain the pigment cobalt
[B] because they contain the pigment chlorophyll
[C] because they contain the pigment carotenoids
[D] because they contain the pigment betacyanins
Show Answer
Correct Answer: B [because they contain the pigment chlorophyll]
Notes:
Chloroplasts are green because they contain the pigment chlorophyll, which is important for photosynthesis. Chlorophyll occurs in many different forms. Chlorophyll a and b are the major pigments of higher plants and green algae.
13. Which Viruses are Relatively Thermostable?
[A] Human immunodeficiency virus
[B] Rubella virus
[C] Hepatits A virus
[D] Influenza virus
Show Answer
Correct Answer: C [Hepatits A virus]
Notes:
Hepatitis A virus are Relatively Thermostable. A highly contagious liver infection caused by the hepatitis A virus.
14. Which plant has spores and embryos but does not have vascular tissue and seeds?
[A] Rhodophyta
[B] Bryophyta
[C] Pteridophyta
[D] Phaeophyta
Show Answer
Correct Answer: B [Bryophyta]
Notes:
Bryophytes are a proposed taxonomic division. These three groups of non-vascular land plants include liverworts, hornworts and mosses. They are notably limited in size and prefer moist habitats. They can survive in dry environments.
15. Volvox is a common example of which of the following?
[A] Thallophyta
[B] Bryophyta
[C] Pteridophyta
[D] Angiosperms
Show Answer
Correct Answer: A [Thallophyta]
Notes:
Volvox is a common example of Thallophyta.
16. Iodine is obtained from which of the following members?
[A] Green algae
[B] Brown algae
[C] Red algae
[D] Blue green algae
Show Answer
Correct Answer: B [Brown algae]
Notes:
Kelp such as Fucus and Laminaria are rich sources of iodine. They are members of the Phaeophyceae brown algae.
17. Heteromorphic alternation of generation is commonly found in__?
[A] Algae
[B] Fungi
[C] Bryophyta
[D] All the above
Show Answer
Correct Answer: C [Bryophyta]
Notes:
Heteromorphic alternation of generation is commonly found in Bryophyta. Bryophytes are small, non-vascular plants, examples of mosses, liverworts, and hornworts.
18. __ tissues upsurge the length of the plant.
[A] Lateral meristem
[B] Apical meristem
[C] Intercalary meristem
[D] All of the above
Show Answer
Correct Answer: B [Apical meristem]
Notes:
Apical meristem tissues upsurge the length of the plant. It is existent at the growing tips or apical of stems and roots.
19. Which of the following pigments gives the yellow colour to leaves, fruits and flowers?
[A] Chlorophyll
[B] Haemoglobin
[C] Anthocyanin
[D] Xanthophyll
Show Answer
Correct Answer: D [Xanthophyll]
Notes:
Xanthophyll is the pigment that provides yellow color to leaves, fruits, and flowers. Here Xanthos stands for yellow, phyllon means leaf.
20. The sequence of events, which is carried out from the time of pollen deposition over the stigma and till the entry of pollen tube inside the ovule is called__.
[A]
pollination
[B] fertilization
[C] pollen-pistil interaction
[D] all of these
Show Answer
Correct Answer: C [pollen-pistil interaction]
Notes:
The sequence of events, which is carried out from the time of pollen deposition over the stigma and till the entry of pollen tube inside the ovule is called pollen-pistil interaction.
