Which of the following are seasonal breeders?

Frogs
Birds
Lizards
All of these

Modified stem present in Gladiolus is:

bulb
rhizome
corm
bulbil

Which of the following is false about external fertilization?

Organisms showing external fertilization exhibit great synchrony between the sexes and release gametes.
Gametes are produced in large number in water to enhance the chances of fertilization.
A large number of gametes are wasted.
A major advantage is that the offspring are protected from predators and there is a great chance of their survival upto adulthood

Which of the following is not vegetative propagule ?

Rhizome and sucker
Tuber and offset
Bulbil(e.g.in Agave), leaf buds and bulb
Antherozoid

Some organisms are capable of asexual or sexual reproduction. Under favourable conditions, reproduction proceeds asexually. When conditions become more stressful reproduction switchess to a sexual mode. Why?

Sexual reproduction is simple and more rapid allowing larger numbers of offspring to be produced
Sexual reproduction requires two separate individuals,who can mutually provide nutrient support during stress
Sexual reproduction produces individuals with new combinations of recombined chromosomes increasing diversity
Asexual reproduction requires more energy

Apomixis in plant means development of a plant

from root cuttings
without fusion of gametes
from fusion of gametes
from cuttings of stem

Individuals of a clone-

Are genetically similar but morphologically different
Are morphologically similar but genetically different
Are morphologically and genetically similar
Are genetically and phenotypically different

What is common between vegetative reproduction and apomixis?

Both are applicable to only dicot plants
Both bypass the flowering phase
Both occur round the year
Both produces progeny identical to the parent

Solution

Vegetative reproduction and apomixis both are asexual methods of reproduction, which gives the progeny genetically similar to parent.

Vegetative propagation in mint occurs by:

offset
rhizome
sucker
runner

Solution

Vegetative propagation in mint occurs through sucker. Vegetative reproduction is a type of asexual reproduction for plants, and is also called vegetative propagation,vegetative multiplication, or vegetative cloning. It is a process by which new plant “individuals” arise or are obtained without production of seeds or spores. It is both natural process in many plant species (as well as non-plant organisms such as bacteria and fungi) and one used or encouraged by horticulturists to obtain quantities of economically valuable plants. A related technique used in cultivation is tissue culture, which involves vegetative reproduction under sterile conditions.

In which one pair both the plants can be vegetative propagated by leaf pieces?

Bryophyllum and Kalanchoe
Chrysanthemum and Agave
Agave and Kalanchoe
Asparagus and Bryophyllum

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