Unit 3 Spermatophyta Flashcards
Plants with naked seeds are called
Gymnosperms
Which is the dominant generation in spermatophytes
Sporophyte
Sporophyte of spermatophytes are
Heterosporous
Microspore ________ and megaspore ______
Pollen grain
The embryo sac
The fertilised ovule forms
Seed
Male gametes are conveyed to the ovule by
Pollen tube
Firs, pines, yews spruces and redwood are examples of
Gymnospermae
The seed of gymnosperms lies on specialised leaf called
Ovuliferous scale
Xylem of gymnosperms is made of
Tracheids thereby producing soft wood
______ is commonly grown in nigeria for electric poles and furniture
Pinus sp
The dominant plants of the world today are
Angiospermae/anthophyta
Unique features of angoisperms are
Flower and fruit
The fruit develops from
The ovary of a flower
Seeds develop from
Fertilised ovule
Floral leaves include
Sepals, petals, stamens amd carpels
Based on number of seed leaves, angiosperms are divided into
Monocotyledons
Dicotyledons
Vascular cambium gives rise to _____ growth
Secondary growth
________ have the largest underground gametophyte
Psilophytes
Development of cuticle prevents
Excess loss of water
Root system aids
Anchorage and efficient absorption
