DATE: 23-08-24
MATHS WALLAH CLASSES
12th (Science)
(Reproduction in plant and animal )
TIME: 1.5Hrs
Biology-
MARKS: 25
SEAT NO:
Q.1 Choose the correct option. 4 Q.3 Answer the following question.(Any Four) 8
1 The ploidy level is NOT the same in ……………… 1 Match the parts of ovule given in column I
(a) Integuments and nucellus with parts of seed given in column II:
(b) Root tip and shoot tip
(c) Secondary nucleus and endosperm
(d) Antipodals and synergids
2 The mentioned syndrome is caused due to
extra copy of chromosome number. Identify
the disease.
2 Explain the difference exist between
apomixis and parthenocarpy based on
number of embryos involved.
3 What is xenogamy, explain its importance.
4 Explain the terms : Factor
5 Define polyembryony, How it is exploited
(a) Down’s syndrome (b) Turner’s commercially.
Syndrome
6 Explain structure of anther and in which
(c) Sex-linked inheritance (d) Haemophilia
condition does anther called
3 Each microspore mother cell divides ______ tetrasporonangiate?
to form tetrad of haploid microspores.
Q.4 Answer the following question.(Any Two) 6
(a) Mitotically (b) Meiotically
1 What is autosomal inheritance, give some
(c) Radically (d) longitudinally
examples.?
4 _________ is a mechanical device to prevent
2 List the significance of double fertilization in
self -pollination in a bisexual flower.
flowering plants?
(a) Protogyny (b) Heterostyly (c)
Protandry (d) Herkogamy 3 Pleiotropy.
Q.2 Answer the following one line. 3 4 Explain the development of dicot embryo.
1 What is hydrophily? Q.5 Answer the following question.(Any One) 4
2 Define Megasporogenesis 1 Describe the process of double fertilization.
3 Name a mechanical device which is used to 2 Describe the haplo- diploid type of sex
prevent self -pollination. determination
