Read the following statements :
(a) More than one Archegonia
(b) Show symbiotic associated with Nitrogen fixing Cyanobacteria and fungus
(c) Show heterosporous nature
(d) Reduced male gametophyte is called a pollen grain
The above statement is related to which option?
1. Bryophytes
2. Gymnosperms
3. Pteridophytes and Gymnosperm
4. Gymnosperm and Angiosperm
In pteridophytes, antheridium are present in :-
1. Leafy gametophyte
2. Prothallus
3. Sporophyll
4. Protonema
Which of the following feature(s) is/are exclusive in angiosperms :-
a. Presence of fruit
b. Double fertilization
c. Female gametophyte
d. Presence of flowers
e. Formation of endosperm
f. Presence of vessels and companion cells
Tick the right one :-
1. a, b, c, e
2. b, c, d, e
3. b, d, e, f
4. a, b, d, f
Motile flagellated cells are never produced by the members of
1. Chlorophyta
2. Chrysophyta
3. Phaeophyta
4. Rhodophyta
Identify the incorrect statement regarding Chlorophyceae.
1. | The major photosynthetic pigments are Chlorophyll a and Chlorophyll b |
2. | The stored food is in the form of starch |
3. | The cell wall is made of cellulose |
4. | Flagella are 2–8 in number, unequal, and always apical. |
The fully developed male gametophyte of an angiosperm is ________ nucleated structure and is _______________ on the sporophyte.
(1) 2, dependent
(2) 3, independent
(3) 2, independent
(4) 3, dependent
Consider the following statements:
I. The plant life cycle alternates between a haploid and a diploid phase: the haploid gamete-producing gametophyte, while the diploid spore-producing sporophyte includes the root and shoot systems.
II. In primitive plants, the gametophytes are usually free-living whereas in seed-bearing plants the gametophytes are sexually dimorphic and develop within the sexual organs of the flower.
III. The structure of the female gametophyte and the fertilization process are distinctive features of the two phylogenetic groups of seed plants, the non-flowering gymnosperms (including conifers and cycads) and the flowering angiosperms.
The correct statements are:
(1) I, II, III
(2) I and II
(3) II and III
(4) I and III
There are certain chemicals which act as stimulus for antherozoids and are secreted by
archegonia. Which of the following is not correct?
(1) Sucrose is secreted by moss archegonia
(2) Malic acid is secreted by fern archegonia
(3) Citric acid is secreted by Club moss
(4) Sodium and lipids are secreted by Riccia archegonia
In organisms with haplontic life cycle:
(1) The zygote divides by meiosis to form haploid spores that grow into haploid individuals.
(2) The zygote divides by mitosis to produce diploid spores that grow into diploid individuals.
(3) The zygote divides by meiosis to produce haploid gametes that develop into haploid individuals.
(4) The zygote divides by meiosis to produce diploid gametes that develop into diploid individuals.
What is a, b, c, and d in the given table for algae?
Class |
Pigment |
Stored food |
Flagella |
Chlorophyceae |
Chl. a, b |
__a__ |
2-8 equal |
__b__ |
Chl. a, c, Fucoxanthin |
Laminarin |
__c__ |
Rhodophyceae |
Chl. a, d, Phycoerythrin |
__d__ |
Absent |
1. | a : Starch; b : Pheophyceae; c : 2, Lateral equal; d : Floriden starch |
2. | a : Glycogen; b : Pheophyceae; c : 2 Lateral unequal; d : Floriden starch |
3. | a : Starch; b : Pheophyceae; c : 2 apical unequal; d : Floriden starch |
4. | a : Starch; b : Pheophyceae; c : 2 Lateral unequal; d : Floriden starch |