- Which of the following is false regarding fertilisation?
(a) In algae and fishes, fusion of gametes occurs outside
the body.
(b) In internal fertilisation, mobile male gamete travels to
female gamete to fuse with it.
(c) Internal fertilisation occurs in gymnosperms,
amphibians, birds, mammals, etc.
(d) Offsprings are not protected from the predators in
external fertilisation.
- Consider the given statements and select the correct option
stating which statements are true (T) and which are false
(F).
(i) Strobilation is observed in the neck of Taenia.
(ii) Estrous cycle is present in mammals like dog, cats,
monkeys, etc.
(iii) Parthenium is the major contributor to pollen allergy.
(iv) Viability of seeds can be tested by immersing the seed
in 0.1% solution of triphenyl formazan.
(i) (ii) (iii) (iv)
(a) T F T F
(b) F F T F
(c) T T F T
(d) F F T T
- Pollination which involves transfer of pollen from anther
of one flower to stigma of genetically different flower is
called
(a) geitonogamy (b) cleistogamy
(c) anisogamy (d) xenogamy.
- When pollen grains from another flower germinate faster
than the pollen grains of the same flower over the stigma,
it is called
(a) dichogamy (b) herkogamy
(c) dicliny (d) prepotency.
- Given figures represents sporulation in various organisms.
A
B
C
Select the option which correctly identifies A, B and C.
A B C
(a) Conidia Chlamydospores Sporangium
(b) Chlamydospores Oidia Sporangiospores
(c) Sporangiospores Chlamydospores Oidia
(d) Conidia Oidia Chlamydospores
- Identify the type of parthenogenesis in which only females
are produced.
(a) Arrhenotoky in mites (b) Thelytoky in lizards
(c) Amphitoky in aphids (d) Arrhenotoky in honey bees
- Study the given statements and select the incorrect one.
(i) Testa is outer, one layered, thick covering of seed.
(ii) Coleorhiza protects the plumule during its emergence
from soil.
(iii) Pericarp is unused nucellus in the seed.
(iv) Coleorhiza does not come out of soil and remains non-
green.
(a) (i), (ii) and (iii) only (b) (ii) and (iv) only
(c) (i), (iii) and (iv) only (d) (ii) and (iii) only
- Double fertilisation was discovered by
(a) Strasburger (b) Dickson
(c) Charles Bonnet (d) Nawaschin.
- Identify the mismatched pair.
(a) Obligatory parthenogenesis - Typhlina brahmina
(b) Cyclic parthenogenesis - Turkeys
(c) Artificial parthenogenesis - Star fish
(d) Paedogenetic parthenogenesis - Wasps
- Which of the following statements is incorrect?
(a) In Bryophyllum, uninjured fallen leaves develops into
new plants from marginal buds.
(b) Turion in Utricularia remains dormant under
unfavourable conditions and in the favourable
conditions forms a new plant.
(c) In Agave, floral buds show vegetative propagation
through bulbils.
(d) Stolons are arched horizontal branches that cause
vegetative propagation in Eichhornia.
- Adventive embryony occurs when
(a) an embryo is haploid and formed without meiosis and
syngamy
(b) all embryo-sac cells including egg are diploid and can
form normal embryos
(c) an embryo is formed directly from diploid egg without
fertilisation
(d) an embryo is formed directly from a diploid cell other
than egg, like integument or nucellus.
- Which of the following statements is correct about
chasmogamous flowers?
(a) The flowers are open, exposing anthers and stigmas.
(b) Flowers do not undergo self pollination.
(c) The flowers remain closed and are self pollinated.
(d) The anthers dehisce inside the closed flower.
- Root cuttings are used to artificially propagate
(a) Bougainvillea (b) Saintpaulia
(c) blackberry (d) grapes.
