Question 7
(a) The diagram given below represents a process occurring in a flower.
Answer the questions that follow:
(0) Name the process and explain it.
(0) Mention the agent involved in the above process.
(iii) What is 'Double Fertilisation?
(iv) Define the term 'Inflorescence'.
(v) Draw a neat, labelled diagram of a carpel.
(b) Answer the following questions briefly:
(1) List any two activities of WHO.
(ii) Write a balanced equation to represent anaerobic respiration in plants.
(iii) Mention two functions of the human skin.
(iv) Name the two membranes covering the lungs.
(v) Give two examples of Amphibians.
Answers
The process is known as Double fertilization.Double fertilization is the process in which a female gametophyte joins with 2 male gametophyte.Inflorescence is a group or cluster of flowers arranged on a stem that is mainly composed in main branch.also it can be defined as the reproductive portion of a plant that bears a cluster of flowers in a specific pattern.
As we know Human skin is the organ of protection.and it act as a barrier or protection shield by variation in temperature, radiation, chemicals etc.
Lungs are protected from 2 membranes namely pleural membrane and Visceral membrane, respectively outer and inner.There is a space between the 2 layers called intrapleural space where filled with fluid.
Amphibious are cold blooded. Amphibious spend their lives in water and on land.Frogs, Newts, blindworms are examples of Amphibious.