Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to

A)angiosperms

B)gymnosperms

C)monocotyledons

D)dicotyledons

Cycas has two cotyledons but not included in angiosperms because of

(a) naked ovules

(b) seemSTike monocot

(c) circinate ptyxis

(d) compound leaves.

Top-shaped multiciliate male gametes, and the mature seed which bears only one embryo with two cotyledons, are characterised features of

(a) cycads

(b) conifers

(c) polypetalous angiosperms

(d) gamopetalous angiosperms

In Mendel’s experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?

(a) round seeds with yellow cotyledons, and wrinkled seeds with yellow cotyledons

(b) only round seeds with green cotyledons

(c) only wrinkled seeds with yellow cotyledons

(d) only wrinkled seeds with green cotyledons