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12th Biology 2012 Set1 Delhi Board Paper Solution

Question 22

Write the function of each one of the following:
(a) (Oviducal) Fimbriae
(b) Coleoptile
(c) Oxytocin

Answer

(a) Fimbriae are the feathery finger-like processes present at the end of the fallopian tubes and it collects the ovum after it is released from the ovary into the fallopian tube.



(b) Coleoptile is a conical sheath present in the monocot seeds, its function is to protect the developing plumule.

(c) Oxytocin is a hormone secreted by the posterior pituitary and it stimulates the contraction of uterine muscles during child birth (parturition).