In conifers, the ______ leaves reduce the surface area. Their thick cuticle & sunken stomata also help to reduce water loss.
2 of 15
Gymnosperm include ______ or tall trees & shrubs.
3 of 15
The two-kinds of spores are produced within ______ that are borne on sporophylls which are arranged ______ along an axis to form lax or compact strobili or cones.
4 of 15
The strobili bearing ______ & microsporangia are called microsporangiates or male-strobili.
5 of 15
The megaspore mother cells are differentiated from one of the cells of the ______
6 of 15
The ovules are borne on ______ which may be clustered to form the female cones .
7 of 15
The megaspore mother cell divides ______ to form four megaspores .
8 of 15
One of the megaspore enclosed within the ______ develop into a Multicellular female gametophytes that bears two or more archegonia or female sex organs .The multicellular female gametophytes is also retained within megasporanium.
9 of 15
Unlike bryophytes & pteridophytes, in gymnosperm the male & female gametophytes do not have an ______ Existence
10 of 15
They remain within the sporangia retained from the ______ .The pollen grains released from the ______
11 of 15
They. are carried in ______ current & come in contact with the opening of the ovules borne on microsporophylls .
12 of 15
The pollen tube carrying the ______ gametes grows towards ______ in the ovules & disccharge their contents near the mouth of archegonia
13 of 15
Following fertilisation, zygote develop into a embryo & the ovules into the seed .these seed are ______
14 of 15
In angiosperms or flowering plants, the pollen grains & ovules are developed in specialised structure called ______ . And seed is enclosed in ______ .
15 of 15
They are range from smallest ______ to tall trees of ______ ( over 100 m ) .
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