Answer: Option D. -> Mangrove
:
D

Seeds from plants such as dandelions are light and have feathery bristles. They can be easily carried away to a long distance by the wind. Whereas some plants, like drumstick and maple trees, have ‘winged’ seeds. These seeds don’t float away but flutter to the ground. Both drumstick and maple tree seeds are dispersed by the wind.

Answer: Option A. -> True
:
A

Asexual reproduction is a method of reproduction which requires only one parent. There is no exchange of genetic information and the offsprings are identical to the parent due to which seed formation is not required. Hence, plants reproduce without seeds through methods such as budding, vegetative propagation and fragmentation.

Answer: Option D. -> II, III  and IV
:
D

Asexual reproduction produces new individuals without the fusion of gametes. Offspring generated this way are genetically identical to their parents. The types of asexual reproduction in plants are vegetative propagation, fragmentation and spore formation. Pollination is a phenomenon associated with sexual reproduction that involves the transfer of male gametes. Hence choices II, III and IV are correct.

Answer: Option C. -> Self and cross-pollination
:
C

Bisexual flowers have both the male and female reproductive parts. This means they can pollinate themselves or another flower on the same plant (self-pollination) or pollinate another flower of the same species of another plant (cross-pollination).

Answer: Option D. -> III and IV
:
D

Flowers are said to be unisexual if they possess either stamen or carpel but not both. The stamen (male part) of a flower is the part that produces pollen and consists of filament and anther. A carpel or pistil (female part) consists of a stigma which is the part of the pistil where pollen is received and an ovary that houses the female gamete. Based on this we can say that, stigma and ovary are present only in female unisexual flowers.

Answer: Option B. -> spirogyra
:
B
Fragmentation is a form of asexual reproduction, in which an organism splits into fragments. Each of these fragments develops into mature, fully grown individuals that are clones of the original organism. Algae reproduce asexually with the help of this method. Spirogyra is a multicellular filamentous green alga found in fresh water.

Answer: Option C. -> Maize
:
C

A flower is unisexual if it possesses either stamen (the male reproductive part) or carpels (the female reproductive part) but not both. Bisexual flowers contain both these parts. An example of unisexual flower is maize.

Answer: Option C. -> Water
:
A, B, and C

Seed dispersal is defined as the transport of seeds away from the parent plant. Seed dispersal ensures that plants are distributed well in its habitat. There are five main modes of seed dispersal namely, gravity, wind, ballistic, water and biotic (by animals).

Answer: Option C. -> Water
:

It is a type of asexual reproduction in plants. In this method, a new plant grows from the vegetative parts of the plant like root, stem and leaf.

Answer: Option C. -> Water
:
Explanation: 1 Mark
Example: 1 Mark
In this mode of reproduction, one or more outgrowths of reproductive units called buds are formed on the parental body. Each bud consists of a small group of cells surrounded by the epithelium. A bud develops as a small outgrowth on the parent's body. It enlarges and develops the characteristics of the parent organism. A bud may become separated from the parent body and then develop into a new individual, or it may separate only after the completion of development. In some cases, the buds never separate and as a result, colonies of interconnected individuals are formed. As seen in yeast.