Give True (T) and False (F) (a) Gymnosperms differ from Angiosperms in having covered seed.

Gymnosperms and angiosperms are seed-producing plants with diplontic life cycles. In gymnosperms, the sporophylls are aggregated to form compact cones. The microsporophylls are broad and are not distinguished into filaments and...

(a) True (b) False (c) True (d) False (e) True

Seeds are naked in gymnosperms, while they are covered in angiosperms. Gymnosperms do not bear flowers, while angiosperms bear flowers.

(a)—B;          (b)—A;           (c)—D;           (d)—C;          (e)—F;        (f)—E,  (g)—G

(a) Androgens are produced by Sertoli cells. (False) Androgens are produced by Leydig cells found in seminiferous tubules of the testis. (b) Spermatozoa get nutrition from Sertoli cells. (True) (c) Leydig cells are...

(a) Abortions could happen spontaneously too. True (b) Infertility is defined as the inability to produce a viable offspring and is always due to abnormalities/defects in the female partner. False Infertility is defined as...

(a) False, it is called infiltration (b) False, it is 71% not 51%. (c) True (d) True

(a) True (b) False (the sequence is trees, shrubs and lowest one herbs). (c) True (d) True

The correct answer is (3) Double fertilization is a unique feature exhibited only by angiosperms. It involves both syngamy and triple fusion.

Plants having little or no secondary growth are Grasses