what is peristaltic movement?

describe double circulation in human beings. why it is necessary?

explain activity 6.1, 6.2 and 6.3

 what are the functions of stomata? state 3  points.

why is small intestine in herbivores longer than in carnivores?

Leaves of healthy potted plant were coated with vaseline to block the stomata will this plant remain healthy for long state three reasons for your answer.

EXPLAIN THE PARASITIC MODE OF NUTRITION WITH 2 EXAMPLES.

name three glands associated with the digestive system. also name their secretion

How does photosynthesis occur in desert plants ?

 what is the difference between saprophytic and parasitic nutrition?

in short explain the alimentary canal(digestive system) in human biengs

transpiration is a necessary evil. justify the statement.

How is the small intestine designed to absorb digested food?

why do we boil the leaf in alcohol when we are testing it for starch

What is the definition of Symbiotic mode of nutrition?

What is the significance of emulsification of fats??????

What is the difference between Pepsin and Trypsin.? 5 points please!

Name the respiratory pigment present in humans and state its funtion.

what are stomata? draw a labelled diagram of stomata & write two function of stomata.

stomata of desert plants remain closed during day time . how do they take up CO2 and perform photosynthesis?

 what is the diffrenece between aerobic and anaerobic respiration?

Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds

write an experiment to show that sunlight is necessary for photosynthesis.

a. explain the process of nutrition in amoeba with a diagram

B. how does paramecium obtain its food?

How is oxygen and carbon dioxide transported in human beings?

explain human digestive system ?

Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?

difference between blood and lymph

A. Draw a diagram to show open stomatal pore and label on it:

1. Guard cells

2. Chloroplast

B. state two functions of stomata.

C. how do guard cells regulate the opening and closing of stomatal pore?

write the difference between single and double circulation?why is double circulation is necessary in human beings?

what is the function of liver in human body?

Explain the digestion of food in human alimentary canal

with the help of an experiment prove that chlorophyll is necessary for photosynthesis?

how are Alveoli designed to maximize the exchange of gases ?

explain the mechanism of photosynthesis?

 describe the mechanism of breathing in human beings....

How do the guard cells regulate opening and closing of stomatal pores? Explain with the help on diagram.

how are lungs designed in human beings to maximise the area for exchange of gases?

what is holozoic mode of nutrition ?

Describe the structure and functioning of nephrons.

All plants give out oxygen during day and carbon dioxide duringnight”. Do you agree with this statement? Give reason.

explain the structure and function of the heart?

difference between photosynthesis and respiration?

Q: Give 4 points of difference between breathing and respiration?

why blood is called connective tissue?

what are the final products of carbohydrates, proteins and fats after their digestion.

 what happens when all green plants disappear from earth?

what are events occur during photosynthesis?