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Which is the first enzyme to mix with food in the digestive tract?
What prevents backflow of blood inside the heart during contraction?
What causes movement of food inside the alimentary canal?
What process in plants is known as transpiration?
What is the main toxic waste kidney filters from the blood?
What is peristalsis?
What is the significance of the emulsification of fats?
Mention the components of the transport system in highly organized plants. State the functions of these components.
What are the functions of gastric glands present in the wall of the stomach?
What is the function of the trachea? Why do its walls not collapse even when there is less air in it?
What will happen if the diaphragm of a person gets ruptured in an accident?
Match Group (A) with Group (B)
Why is transpiration important for plants?
Name the following:
The process in plants that links light energy to chemical energy.
an organism that can prepare their own food.
The cell organelle where photosynthesis occurs.
Cells that surround a stomatal pore.
Organisms that cannot prepare their own food.
An enzyme secreted from gastric glands in the stomach that act on proteins.
How are the alveoli designed to maximize the exchange of gases?
What are the methods used by plants to get rid of excretory products?
Why is diffusion insufficient to meet the oxygen requirements of a multicellular organism like humans?
Write down an account of the composition of blood.
Which is the major nitrogenous waste product in human beings? How is it removed from the body?
Describe the alimentary canal of man.
Draw the diagram of a sectional view of the human heart and label the following parts:
The chamber of the heart that pumps out deoxygenated blood.
The blood vessel that carries away oxygenated blood from the heart.
The blood vessel that receives deoxygenated blood from the lower part of our body.
The part which prevents the backward flow of blood.
How are nitrogenous wastes and water excreted in Amoeba?
What is ultra filtration? How does it occur?
Describe the process of urine formation in kidneys.
(a)Name two different ways in which glucose is oxidized to provide energy for various organisms.
(b)Write any two differences on the two ways of oxidation of glucose in organisms.
Differentiate between an autotroph and a heterotrophy
Match the words of Column A with that of Column B.
Explain the three pathways of a breakdown in living organisms.