Pinus seed cannot germinate and establish without fungal association. This is because :
it has obligate association with mycorrhizae.
it has very hard seed coat
its seeds contain inhibitors that prevent germination.
its embryo is immature
A.
it has obligate association with mycorrhizae.
Fungus associated with roots of Pinus increases minerals & water absorption for the plant by increasing surface area and in turn fungus gets food from plant. Therefore, mycorrhizal association is obligatory for Pinus seed germination.
Which of the following is false in angiosperms?
Egg cell – Haploid
Megaspore – Diploid
Pollen grain – Haploid
Synergid – Haploid
Synergid – Haploid
Which of the following statements about Pteridophytes is true?
The homosporous forms are precursors to the seed habit
Gametophyte is the dominant plant body
First terrestrial plants to possess vascular tissues
Equisetum is a member of pteropsida
Equisetum is a member of pteropsida
Phloem in gymnosperms lacks :
Sieve tubes only
Companion cells only
Both sieve tubes and companion cells
Albuminous cells and sieve cells
Diplontic type of life cycle is seen in
(i) Fucus
(ii) Gymnosperms
(iii) Pteriodophytes
(iv) Bryophytes
(i) only
(i) and (iv) only
(i) and (iii) only
(iii) only
(iii) only
Pick out the wrong statement
(A) Apoplast is the system of adjacent cell walls that is continuous throughout the plant
(B) Endodermis is impervious to water molecules
(C) Pinus seeds germinate and establish without the presence of mycorrhizae.
(A) and (B)
(B) and (C)
(C) only
(B) only
(B) only
Which of the following statements is wrong about bryophytes?
Bryophytes are also called amphibian of the plant kingdom.
The gametophyte is the main plant body
Sexual reproduction takes place in the presence of water
Sporophyte is not free-living but attached to the photosynthesis gametophyte
Sporophyte is not free-living but attached to the photosynthesis gametophyte
