3 Mei
(4) What are sex hormones? Why are they named so? State their fanction.
Very Short Answer Type Questions
25) What are the major groups of microorganisms?
2
26) What are the advantages of using CNG and LPG as fuels?
7) Differentiate between Flora and Fauna.
Answers
4. A hormone, such as oestrogen or testosterone, affecting sexual development or reproduction. The sex hormones help to delop the secondary sexual characters. Such as, in boys they control formation of sperm by testes and growth of facial hair.
Answer:
(4) They are called sex hormones because they control the sexual activities and help us to distinguish boys from girls. The sex hormones help to delop the secondary sexual characters. Such as, in boys they control formation of sperms by testes and growth of facial hair.
(25) They are of six major types: bacteria, archaea, fungi, protozoa, algae, and viruses.
(26) The advantages of using CNG and LPG as fuels are as follows:
# They both are cleanest burning fuels of all fossil fuels.
# They are less polluting, non-corrosive.
# They can be sent through pipes easily.
# These are easily available and have affordable cost.
# LPG and CNG both are easy to store and transport.
(7) Flora is defined as all the naturally occurring native plants of a particular region. Fauna is all the animal life present in a particular place or at a particular time period.