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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
what are the functions of stomata? state 3 points.
why is small intestine in herbivores longer than in carnivores?
. A: Glomerulus acts as a dialysis bag, B : Bowman's capsule is found in heart.
a. Both 'A' and 'B' are true statements. b. Both 'A' and 'B' are false statements. c. A' is true while 'B' is false. d. A' is false while 'B' is true.
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.
Why do we test for starch and not glucose to prove photosynthesys has taken place?
name three glands associated with the digestive system. also name their secretion
How does photosynthesis occur in desert plants ?
what would happen is there was no nitrogen in the atmosphere.
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??????
2.) Urine concentration depends upon the presence of hormone :
a.) Thyroxine b.) Vasopessin c.) Melatonin d.) Adrenaline
3.) In flatworms excretory organs are :
a.) flame cells b.) green glands c.) nephridia d.) malpighian tubules .
4.) Ascent of sap occurs through :
a.) Cohesion tension b.) Mass flow c.) Imbibition d.) Capillarity
5.) Which one is an anabolic process ?
a.) Respiration b.) Digestion c.) Photosynthesis d.)Ascent of sap
6.) A catabolic process is :
a.) absorption of minerals b.) ascent of sap c.) respiration d.) assimilation .
Q.) What is Pleura ?
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?
why do the walls of the alveoli contain an extensive network of blood vessels?
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?
* Take some fruit juice or sugar solution and add some yeast to this. Take this mixture in a test tube fitted with one holed cork.
* Fit the cork with a bent glass tube. Dip the free end of the glass tube containing freshly prepared lime water.
* What change is observed in the lime water and how long does it take for this change to occur?
* What does this tell us about the products of fermentation?
* Why are fruit juice or sugar solution and yeast are taken in this activity? Explain.
explain human digestive system ?
Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
difference between blood and lymph
why are lungs pink in colour
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?
why food coming from stomach is to be made alkaline?
write the difference between single and double circulation?why is double circulation is necessary in human beings?
What is the purpose of sending blood to the kidneys for filtration?
what is the function of liver in human body?
Coiled and well developed alimentary canal first develop in A)protozoans
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 ?
What are the aim and reslts of activity 6.4 and 6.5??
explain the mechanism of photosynthesis?
describe the mechanism of breathing in human beings....
The leaves of a plant first prepare food A by photosynthesis.Food A then gets converted into food B. What are food A and B?
How do the guard cells regulate opening and closing of stomatal pores? Explain with the help on diagram.
What is observed in Activity 6.8 of the NCERT book of Science? What is the activity for? What does it show? Please help me? I have my exams tomorrow and I cannot conclude anything from this one activity! For further help, it is on pg. no. 109. Please help fast.
how are lungs designed in human beings to maximise the area for exchange of gases?
in the case of a single-celled organism, no specific organs for taking in food, exchange of gases or removal of wastes may be needed because the entire surface of the organism is in contact with the environment. What is meant by this?
what is holozoic mode of nutrition ?
What is sequence of steps in photosynthesis? How is it different in desert plants and those in temprate regions?
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.
13. Right part of the human heart contains
a) Oxygenated blood b) Mixed blood c) Deoxygenated blood d) No blood
explain the structure and function of the heart?
What are the uses of end products of photosynthesis?
difference between photosynthesis and respiration?
the dialyzing fluid has the same osmotic pressure as the
Q: Give 4 points of difference between breathing and respiration?
write chemical equation of anaerobic respiration in yeast
why blood is called connective tissue?
what are the final products of carbohydrates, proteins and fats after their digestion.
make a list of diet chart of 12 year old child? its urgent...................
what happens when all green plants disappear from earth?
what are events occur during photosynthesis?
10 differences between unicellular and multicellular organisms
(1) In which form excess glucose molecules are stored as reserve food in plants?
(2) In which form excess glucose molecules are stored as reserve food in animals?
(3) What is the full form of NADP?
(4) What is the full form of RUBP?
(5) Why is glottis guarded by epiglottis?
(6) why is the wall of trachea supported by cartilaginous ribgs?
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