+1 vote
8.4k views
in Biology by (106k points)
edited by

(a) List two reasons.for the appearance of variations among the progeny formed by sexual reproduction.
(b) (i) Name the part marked'A'in the diagram alongside.
     (ii) How does 'A'reaches part'B' ?
     (iii) State the importance of the part 'C'.
 (iv) What happens to the part marked 'D' after fertilisation is over ?

1 Answer

+1 vote
by (314k points)
selected by
 
Best answer

(a) Variation is seen among progeny formed by sexual reproduction because of:
(i) Involvement of two different individuals.
(ii) Creation of new combination of variants.
(b) 

(i) A-pollen or pollen grain.
(ii) It reaches the stigma (B) by agents of pollination.
(iii) C (pollen tube) helps male gamete to reach the egg (ovule).
(iv) After
fertilsation it converts into embryo.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...