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  • Subject:

    Zoology

  • Topic:

    Reproduction in Organisms

Plants like Elm (Ulmus), Dandelion (Taraxacum) and members of Rose Family vegetatively reproduce by

(1) Rhizome

(2) Sucker

(3) Stolon

(4) Corm

The vegetative propagule of Bryophyllum is:

(1) Bulbil

(2) Leaf buds

(3) Rhizome

(4) Offset

Water hyacinth is one of the most invasive weeds primarily because:

(1) It gets adapted to any fresh water body easily

(2) It produces secondary metabolites against herbivores

(3) It can propagate vegetatively at a phenomenal rate

(4) It is predated upon by a large number of organisms

Isogametes are seen in:

(1) Cladophora

(2) Fucus

(3) Human beings

(4) Ficus

When both male and female flowers are present on the same plant, it is said to be:

(1) Bisexual

(2) Monoecious

(3) Unisexual

(4) Dioecious

The number of chromosomes in a meiocyte of the fruit fly is:

(1) 4

(2) 8

(3) 12

(4) 16

The most critical event in sexual reproduction is:

(1) Gametogenesis

(2) Gamete transfer

(3) Fertilization

(4) Embryogenesis

With respect to organisms exhibiting internal fertilization, organisms exhibiting external fertilization show:

(1) More variations

(2) Great synchrony between sexes

(3) Large female size than males

(4) Less vulnerability to predation

Ginger is vegetatively propagated through:

(1) Rhizome

(2) Bulbil

(3) Stolon

(4) Offset

 

In animals exhibiting internal fertilization:

(1) There is high synchrony between the two sexes

(2) The chances of desiccation of the embryo is high

(3) The male gamete is motile

(4) Vulnerability to predators is increased