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what is peristaltic movement?
describe double circulation in human beings. why it is necessary?
explain activity 6.1, 6.2 and 6.3
Shiju collected his saliva and mixed it with liquid A in the test tube. In another test tube he took only liquid A. After 10 minutes, he added a few drops of iodine solution in the mixture in the first test tube. It did not show any colour but when he treated the other test tube with iodine, a blue black colour appeared. What is the aim of this activity? What is liquid A? Why did the first test tube not show any colour change with iodine while the second one did?
what are the functions of stomata? state 3 points.
What is sequence of steps in photosynthesis? How is it different in desert plants and those in temprate regions?
why is small intestine in herbivores longer than in carnivores?
make a list of diet chart of 12 year old child? its urgent...................
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.
suman collected her saliva and mixed it with liquid A in the test tube. In another test tube, she took only the liquid A. After about 10 minutes, she added a few drops of iodine solution to the mixture in the first test tube. it did not show any colour but when she treated the other test tube with iodine, a blue black colour appeared. now answer the following questions:
(a) what is the aim of the activity?
(b) what is the liquid A?
(c) why did the first test tube not show any colour change with iodine solution while second one did?
(d) which enzyme is responsible for such a result?
(e) why does a piece of bread chewed for a long time tastes sweet?
name three glands associated with the digestive system. also name their secretion
why small intestine is richly supplied with blood vessels.
How does photosynthesis occur in desert plants ?
what is the difference between saprophytic and parasitic nutrition?
Please explain me this?
in short explain the alimentary canal(digestive system) in human biengs
transpiration is a necessary evil. justify the statement.
name the substances which are reabsorbed from thr urine before passing itno urinary bladder ?
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
Name the type of nutrition - Cuscuta, lices and ticks derive nutrition from plants or animals without killing them.
What is the definition of Symbiotic mode of nutrition?
Give the appropriate terms to the following statements:
a) any substance taken into the body for purpose of providing nutrition.
b) conversion of complex food particles into simpler food particles in presence of enzymes
What is the significance of emulsification of fats??????
What is the difference between Pepsin and Trypsin.? 5 points please!
Listed below are some properties of types of blood vessel. Separate them into three groups as
(1) Arteries (2) Veins (3) Capillaries
a) carry blood to the heart
b) carry blood from the heart
c) have thick elastic walls
d) blood flows through them in pulses
e) oxygen and food pass through the walls
f) have valves to prevent back-flow
Name the respiratory pigment present in humans and state its funtion.
how are the steps of photosynthesis diff in desert plants and those in temperate regions
what are stomata? draw a labelled diagram of stomata & write two function of stomata.
Why amphibians can tolerate certain amount of mixing of oxygenated and deoxygenated blood?
stomata of desert plants remain closed during day time . how do they take up CO2 and perform photosynthesis?
Name two dissolved substances which are partially or completely reabsorbed from the kidney tubule back in the blood.
what is the diffrenece between aerobic and anaerobic respiration?
What is peristalsis? Explain both mechanical as well as the chemical part of digestion of food in the mouth of man.
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?
in the process of photosynthesis ,food A is prepared which gets converted into food D what are A and B why is A converted to B
explain human digestive system ?
is the food vacuole of amoeba temporary structure or permanent structure ?
Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
What is the advantage of separate channels in mammals and birds for oxygenated and deoxygenated blood?
difference between blood and lymph
The two openings of the pharynx ,one leading to trachea and the other leading to oesophagus ,lie very close to each other . yet the food we swallow normally does not enter into our trachea........can any1 tell me y itz so?????
A. Draw a diagram to show open stomatal pore and label on it:
1. Guard cells
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?
Mention the substances which are transported through the phloem to various parts of the plant. Also mention the organs in which these substances ar synthesized.
Explain the digestion of food in human alimentary canal
what is a difference between saprophytic and saprozoic mode of nutrition?
with the help of an experiment prove that chlorophyll is necessary for photosynthesis?
What is the purpose of sending blood to the kidneys for filtration?
how are Alveoli designed to maximize the exchange of gases ?
all living organisms are dependent on light for their nourishment. justify the statement
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 ?
the structure and functioning of nephrons.
a plant that is not visibly growing still alive, some animals breathe without visible movement. So what characteristics will define they are living?
All plants give out oxygen during day and carbon dioxide duringnight”. Do you agree with this statement? Give reason.
which pancreatic enzyme is effective in digesting proteins?
explain the structure and function of the heart?
difference between photosynthesis and respiration?
When we breathe out why does the air passage not collapse?
Q: Give 4 points of difference between breathing and respiration?
why blood is called connective tissue?
What are stomata and lenticels?What is their role in respiration?
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?
on which type of food does salivary amylase act at the buccal cavity.?write the name of the initial product due to the action of amylase.
10 differences between unicellular and multicellular organisms
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