8
MCQ (Single Correct Answer)
If the diploid number of a flowering plant is 36 . What would be the chromosome number in its endosperm?
A
36
B
18
C
54
D
72
9
MCQ (Single Correct Answer)
Protonema is
A
haploid and is found in mosses
B
diploid and is found in liverworts
C
diploid and is found in pteridophytes
D
haploid and is found in pteridophytes
10
MCQ (Single Correct Answer)
The giant redwood tree (Sequoia sempervirens) is a/an
A
angiosperm
B
free fern
C
pteridophyte
D
gymnosperm
11
Food is stored as floridean starch in Rhodophyceae. Mannitol is the reserve food material of which group of algae?
Explanation
The members of Phaeophyceae (brown algae) store mannitol as a reserve food material.
12
Give an example of plants with
(a) haplontic life cycle
(b) diplontic life cycle
(c) haplo diplontic life cycle
Explanation
(a) Haplontic life cycle It is exhibited by Volvox, Spirogyra and Chlamydomonas. The dominant photosynthetic phase in these plants is gamotophytic phase which develops from a haploid spores after a mitotic cell division of zygote.
(b) Diplontic life cycle is found in gymnosperms and angiosperms. The dominant phase is diploid sporophyte plant develop from zygote.
(c) Haplodiplontic life cycle It is an intermediate conditions exhibited by bryophytes and pteridophytes. Here haploid gametophytic stage alternates with diploid sporophytic stage.
