CBSE
Multiple Choice QuestionsAfter pollination the number of chromosome in egg will be
n
2n
3n
None of these
Match the following columns
| Column I | Column II |
| A. Zoophily | 1. Pollination by birds |
| B. Ornithophily | 2. Pollination by insects |
| C. Entomophily | 3. Pollination by bats |
| D. Chiropterophily | 4. Pollination by animals |
A - 4; B - 1; C - 2; D - 3
A - 1; B - 2; C - 3; D - 4
A - 3; B - 2; C - 1; D - 4
A - 4; B - 2; C - 1; D - 3
Double fertilisation is the
fertilisation of two eggs in an embryo sac
fusion of one male gamete with the egg cell and another male gamete with the secondary nuclei
fusion of two male gametes with two polar nuclei
fusion of one male gamete with secondary nucleus
The reduction division in chromosomes takes place in
pollen grains
tapetum
megaspore cell
megaspore mother cell
Endothecium and tapetum are formed from
primary sporogenous tissue
primary parietal layer
primary parietal layer and sporogenous tissue respectively
sporogenous tissue and primary parietal layer respectively
Embryo rescue is resorted to
obtain new generation of plants quickly
to reduce chance of seedling growth
ensure growth of interspecific hybrids
induce somaclonal variations
Parthenogene embryos in plants are those which are formed by
unfertilised eggs
fertilised eggs
sporophytic cells
male gametophyte
Apomictic embryos in citrus arise from
synergids
maternal sporophytic tissue in ovule
antipodal cell
haploid cell
Following are the statements regarding sexual reproduction in flowering plants.
I. Parthenium is a plant that causes pollen allergy.
II. If tapetum is destroyed, then unfeasible male gametophytes are produced.
III. Egg apparatus has 3 synergids and 2 antipodal cells.
IV. Megaspore is the first cell of gametophytic generation.
Choose the incorrect option.
I and II
II and III
III and IV
I and IV
The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?
Endosperm
Cotyledon
Plumule
Aleurone layer
