- Meiosis never occurs in the life cycle of haploid
organisms.
- The methods of asexual reproduction and vegetative
propagation are identical, and the terms can be used
interchangeably in plants and animals.
- Onion is not propagated vegetatively by bulbs, but
can be done so, with the help of bulbils, formed
amongst the flowers.
- Vegetative propagules are prone to infections,
desiccations and decay, as they are not protected
and dehydrated like seeds.
- Sugarcane is regularly propagated by planting
segments of basal part of stems, having atleast one
internode.
- Runners are special arched horizontal branches,
which develop at the base of a crown e.g., lawn
grass.
match The columns
- Match Column-I with Column-II.
Column-I Column-II
A. Narcissus (i) Leaf cutting
B. Colocasia (ii) Stem cutting
C. Adiantum (iii) Gemmae
D. Agave (iv) Bulbil
E. Marchantia (v) Rhizome
F. Clerodendron (vi) Corm
G. Sansevieria (vii) Bulb
- Match Column-I with Column-II. (There can be more
than one match for items in Column I).
Column-I Column-II
A. Fragmentation (i) Pear
B. Offset (ii) Water hyacinth
C. Blackberry (iii) IBA
D. Simple layering (iv) Jasmine
E. Grafting (v) Riccia
F. Parthenocarpy (vi) Mango
G. Stolons (vii) Strawberry
(viii) Vallisneria
(ix) Apple
(x) Cherry
(xi) Grapes
(xii) NAA
(xiii) Spirogyra
(xiv) Water Lettuce.
passage Based Questions
28.(A) Complete the given passage with appropriate words
or phrases.
(a) Regeneration is formation of the whole body of an
organism from a small fragment, which is called
(i) , or replacement of the lost part, which is called
(ii).
(b) (iii) are motile, flagellated spores, while (iv) are
non-motile spores at the tip or lateral side of
special hyphal branches, and (v) are thick walled
spores produced directly from hyphal cells.
(B) Correct the errors, wherever present.
(a) Grafting is successful in monocots and unsuccessful
in dicots, as they have open vascular bundles.
(b) In grafting, scion is always older than stock.
Assertion & reason
In each of the following questions, a statement of
Assertion (A) is given and a corresponding statement
of Reason (R) is given just below it. Of the statements,
mark the correct answer as :
(a) if both A and R are true and R is the correct explanation
of A
(b) if both A and R are true but R is not the correct
explanation of A
(c) if A is true but R is false
(d) if both A and R are false.
- Assertion : The period of growth in all organisms is
called juvenile phase.
Reason: It is followed by vegetative phase in
plants.
- Assertion : Sexual reproduction in organisms generally
involves the fusion of gametes.
Reason : These gametes are always from two different
individuals.
- Assertion : Gametogenesis and gamete transfer are
the two main fertilisation events.
Reason : Fertilisation always involves fusion of the
gametes obtained from two different individuals.
- Assertion : Gametes are always haploid, though the
parent plant body may be either haploid or diploid.
Reason : Meiosis never occurs in life cycle of organisms
that are haploid.
- Assertion : Asexual reproduction is the common
method of reproduction in simple organisms.
