Question

The flowers are small and colorless with no scent. This is a common type seen in almost all gymnosperms.

Answer 1

Hint: Thermoreceptors perceive the sensation of hot or cold. There are separate receptors for warmth and cold. These receptors are located in the dermis and epidermis of the skin.

Complete step by step answer:
Flower is considered to be the main part responsible for sexual reproduction in plants. Androecium is the male part and Gynoecium is the female part of the flower.
Sexual reproduction is divided into three stages. Pre-fertilisation, Fertilisation and Post-fertilisation events.
Pre-fertilisation includes formation of gametes..Fertilization includes fusion of gametes and Post-fertilisation includes formation and development of embryos.
The first step in fertilisation is pollination. This includes transfer of pollen grains from the anther to the stigma of a flower..

Depending on the position of anther and stigma, pollination is of two types:
A. Self Pollination : The transfer of pollen from the anther to the stigma of the same flower or same plant is known as Self pollination. This is of two types :
1. Autogamy : The anther and stigma belong to the same flower (auto means self and gamy means marriage).
2. Geitonogamy : The anther and stigma belong to different flowers on the same plant (Geiton means neighbour and gamy means marriage)
B. Cross Pollination : The transfer of pollen from the anther to the stigma of different plants is known as cross pollination or xenogamy or allogamy.

External agents are needed for cross pollination. These agents can be biotic or abiotic factors. Biotic factors include animals like bats, insects, elephants, ants, snails, snakes etc.
Abiotic factors are nonliving factors. These include water and wind. When water is the agent used for pollination, such type is known as hydrophily and it is known as anemophily when air is the agent used for pollination.

Anemophily
It is defined as a mode of cross pollination through the agency of wind. Examples are maize, date palm etc.

Characteristics of flowers that undergo cross pollination by winds:
1. The flowers are colourless and odourless
2. Large amount of pollens are produced
3. The pollens are light in weight
4. The pollens are dry and non sticky

Note:
Anemophily is an adaptation that reduces the effect of inbreeding. About 10% of plant species show this type of pollination.