Scientists are trying to transfer apomictic genes into hybrid varieties of several of our food and vegetable crops so that:
1. They get resistance against common pathogens
2. The yield of these plants can be increased many folds
3. Hybrid seeds need not be produced every year
4. Their germplasm is easily stored in labs for further research
Which of the following is the most common abiotic pollinating agent?
1. | Insects | 2. | Birds and bats |
3. | Wind | 4. | Water |
The asexual production of seeds is called as:
1. Adventition
2. Fragmentation
3. Self-fertilization
4. Apomixis
The ovule of an angiosperm is technically equivalent to
1. megasporangium
2. megasporophyll
3. megaspore mother cell
4. megaspore
Megasporangium is equivalent to
(1) embryo sac
(2) fruit
(3) nucellus
(4) ovule
Which one of the following may require pollinators, but is genetically similar to autogamy?
(1) Geitonogamy
(2) Xenogamy
(3) Apogamy
(4) Cleistogamy
Flowers, which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
(1) water
(2) bee
(3) wind
(4) bat
Functional megaspore in an angiosperm develops into
(1) ovule
(2) endosperm
(3) embryo sac
(4) embryo
The morphological nature of the edible part of coconut is
(1) perisperm
(2) cotyledon
(3) endosperm
(4) pericarp
Attractants and rewards are required for
(1) anemophily
(2) entomophily
(3) hydrophily
(4) cleistogamy