Tinning : Tin : : Galvanizing : _________
Mammals : _________ : : Amphibia : Fishes
Solar water – heater works on renewable energy system
In human beings the blood goes to the heart in one cycle once.
In frogs, thyroid secretion stimulates the metamorphosis from tadpole to adult frog.
The molecular formula of acetic acid is _________ .
(b) CH3 – CH3
Carbon dioxide enters into the leaves through tiny pores present on the surface of the leaf called _________.
_________ solution is blue in colour.
Yeast reproduces by _________.
(a) spore formation
(b) multiple fission
Raisins put in water absorb water by the process of _________.
Give scientific reason: Common salt has high melting point and boiling point.
Draw neat labelled diagram of the pancreas with their associated structures
State the connecting links between Peripatus with Annelida and Arthopoda.
Name any two plant hormones and state their functions.
What are plant hormones?
Differentiate between Toilet soap and Laundry soap.
State any four objectives of sustainable development.
What is an alloy?
Give two examples of alloys with their chemical composition.
Name the following :
(a) Cells that assist the neuron in their function
(b) The small gap between the consecutive neurons
(c) Part of the brain that co-ordinates the voluntary functions
Explain the process of fertilization in human beings.
Explain the process of development in human beings.
Explain the process of birth in human beings.
What are vestigial organs?
Give two examples of vestigial organs in human beings and plants.
What is recycling of waste?
Examples of recycling of waste.
State two advantages of recycling.
Which mode of reproduction gives rise to variation?
Give the importance of variation in survival of species.
Given below are the end products of different reactions involving glucose. Write the appropriate end product in front of the following:
(1) Anaerobic reaction =
(2) Reaction in human muscles =
(3) Aerobic respiration
(4) Reaction in plant cells =
(5) Reaction in liver =
Give other two names of ethanol.
Give the structural formula of ethanol.
Give two properties of ethanol.
Explain the action of phosphorous trichloride with ethanol. Write the balanced chemical equation of the above reaction.