21.
Function of tapetum is
A
Respiratory
B
Protective
C
Nutritive
D
All the above
View Answer
Correct Answer: C — Nutritive
Explanation:
nutritive
Loading practice questions
Browse topic-based CBSE practice sets.
214 practice sets · Page 2 of 11
Function of tapetum is
Respiratory
Protective
Nutritive
All the above
Correct Answer: C — Nutritive
Explanation:
nutritive
Function of guiding and attracting pollen tube is done by
synergids
antipodal cells
secondary nucleus
egg cell
Correct Answer: A — synergids
Explanation:
synergids
Formation of embryo directly from nucellus and integument is
Apospory
Apomixis
Apogamy
Adventitive polyembryony
Correct Answer: D — Adventitive polyembryony
Explanation:
adventitive polyembryony
Entry of pollen tube through chalazal end is
syngamy
porogamy
basigamy
mesogamy.
Correct Answer: C — basigamy
Explanation:
basigamy
Endosperm is completely consumed by the developing embryo in Pea and Groundnut
Maize and Castor
Castor and Groundnut
Maize and Pea
Pea and Groundnut
Correct Answer: A — Maize and Castor
Explanation:
Maize and Castor
Embryo sac is
megagametophyte
microsporangium
megasporangium
microgametophyte
Correct Answer: A — megagametophyte
Explanation:
megagametophyte
Egg apparatus consists of
egg and antipodals
egg and synergids
polar nuclei
egg
Correct Answer: B — egg and synergids
Explanation:
egg and synergids
Effect of pollen on character of pericarp and seed coat is
metaxenia
xenia
chimera
ruminate endosperm
Correct Answer: A — metaxenia
Explanation:
metaxenia
Double fertilization involves
Fertilization of egg and central cell by two sperms brought by same pollen
tube fertilization of two eggs in the same embryo sac by two sperms
brought by one pollen tube fertilization of an egg by two male gametes
fertilization of egg and central cell by two sperms brought by two different pollen tubes
Correct Answer: A — Fertilization of egg and central cell by two sperms brought by same pollen
Explanation:
Fertilization of egg and central cell by two sperms brought by same pollen tube
Device for self pollination is
heterostyly
none of the above
unisexuality
dicliny
Correct Answer: B — none of the above
Explanation:
none of the above
Cleistbgamous flowers are
Insect pollinated
Wind pollinated
Self pollinated
Bird pollinated
Correct Answer: C — Self pollinated
Explanation:
self pollinated
Bird pollination is
myrmecophily.
chiropterophily
ornithophily
malacophily
Correct Answer: C — ornithophily
Explanation:
ornithophily
Bicarpeliary gynaecium and oblique ovary occurs in
Banana
Mustard
Brinjal
Pisum
Correct Answer: C — Brinjal
Explanation:
Brinjal
Arrangement of nuclei in normal dicot embryo sac is
2+3+3
3+2+3
2+4+2+
3+3+2
Correct Answer: B — 3+2+3
Explanation:
3+2+3
Anthesis is
reception of pollen by stigmas
formation of pollen
development of anther
opening of floral bud
Correct Answer: D — opening of floral bud
Explanation:
opening of floral bud
Anther represents
Spermatogonia
Male gametophyte
Male sporophyll
Female gametophyte
Correct Answer: C — Male sporophyll
Explanation:
male sporophyll
Anemophily occurs in
Vallisnaria
Bottle brush
Coconut
Salvia
Correct Answer: C — Coconut
Explanation:
Coconut
An advantage of cleistogamy is
Each visit of pollinator brings hundreds of pollen grains
Seed set is not dependent on pollinators
It leads to diversity
Seed dispersal is more efficient and widespread
Correct Answer: B — Seed set is not dependent on pollinators
Explanation:
seed set is not dependent on pollinators
A diploid female plant is crossed with tetraploid male. The ploidy of endosperm will be
Diploidy
Pentaploidy
Tetraploidy
Triploidy
Correct Answer: C — Tetraploidy
Explanation:
Tetraploidy
The smallest gymnosperm is
Wolfia sp.
Sequoia sp.
Eucalyptus sp.
Zamia sp.
Correct Answer: D — Zamia sp.
Explanation:
Zamia sp.