Seed Plants:
Seed may be defined as a ripened and fertilized…….
a) egg
b) ovule
c) microspore
d) ovary
The evolution of seed is the most important process in the evolution of vascular plants because……..
a) seed can store lot of water
b) can survive unfavorable conditions
c) seeds are lighter in weight
d) all of these
Explanation: seeds are responsible for the preservation of species
The evolution of seed involve …….steps.
a) two
b) three
c) four
d) five
Explanation: 1. Development of heterospory, 2. Retention of megaspore inside the sporangium, 3. Formation of intugement and 4. Evolution of pollen tube
Heterospory occur in ……..
a) selaginella
b) lycopodium
c) equisetum
d) lepidodendron
Selaginella is the living member of……..
a) Lycopsida
b) Psilopsida
c) Sphenopsida
d) Pteropsida
