what is peristaltic movement?

why are lungs pink in colour

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.

What is sequence of steps in photosynthesis? How is it different in desert plants and those in temprate regions?

EXPLAIN THE PARASITIC MODE OF NUTRITION WITH 2 EXAMPLES.

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

 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?

How does photosynthesis occur in desert plants ?

Why amphibians can tolerate certain amount of mixing of oxygenated and deoxygenated blood?

Dental Formula

• Dental formula formilk teethin humans is 2120/2120. It means that each half of upper jaw and lower jaw has 2 incisors, 1 canine and 2 premolars. Molars are absent in milk teeth. There are 20 teeth in the milk teeth set.
• Dental formulaforpermanent teethin human is. It means that each half of upper jaw and lower jaw has 2 incisors, 1 canine, 2 premolars, and 3 molars.
• The dental formula in dogs (carnivore) is
• The dental formula in rabbits (herbivore)is

Please explain me this?

 what is the difference between saprophytic and parasitic nutrition?

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

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

When we breathe out why does the air passage not collapse?

transpiration is a necessary evil. justify the statement.

How is the small intestine designed to absorb digested food?

make a list of diet chart of 12 year old child? its urgent...................

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

4-24)give reasons for the following

a)Nostrils are lined with mucus

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!

how are the steps of photosynthesis diff in desert plants and those in temperate regions

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.

 draw flowchart to show the machenism of human respritary system....???

PLEASE HURRY 

I WANT THIS ANSWER TODAY........
PLEASEdraw flowchart to show the machenism of human respritary system....???

PLEASE HURRY 

I WANT THIS ANSWER TODAY........
PLEASE

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

What is the purpose of sending blood to the kidneys for filtration?

 what is the diffrenece between aerobic and anaerobic respiration?

 1.Is  visible movement a defined characteristics of life?

2.Why are molecular movement needed for life?

3.Why are no specific organs are needed for taking in food ,exchange of gases for removal of wastages in single-celled organisms?

4.How do living things get their food ?

5.How is food carried along the digestive tract in aur body?

6.How many pairs of salivary gland are located in our body?and where they are located?

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?

Compare the function of alveoli in lungs and nephrons in kidneys with respect to their structure and functions?

How is oxygen and carbon dioxide transported in human beings?

explain human digestive system ?

AN ACTIVITY

* 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.

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

difference between blood and lymph

Mention the role of following in digestion:

a. pepsin

b. saliva

c. villi

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?

Which process in plants creates suction force to help water column rise in plants?

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

how can plant make food when there is rainy season and no photoperiod ?

what is the function of liver in human body?

What are the aim and reslts of activity 6.4 and 6.5??

Explain the digestion of food in human alimentary canal

• Take two small pots of approximately the same size and same amount of soil. One should have a plant in it. Place a stick of the same length as the plant in other pot.
• Cover the soil in both pots with a plastic sheet so that moisture cannot escape by evaporation.
• Cover both sets, one with the plant and the other with the stick, with plastic sheets and place in bright sunlight for half an hour.
• Do you observe any difference in the two cases?

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

how are Alveoli designed to maximize the exchange of gases ?

40. Sneezing can be best described as

a) Forceful sudden inspiration

b) Jerky incomplete inspiration

c) Forceful sudden expiration

d) Jerky incomplete expiration

explain the mechanism of photosynthesis?

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

All plants give out oxygen during day time and carbon dioxide during night time. Justify.

pls answer this question fast!!!!!

i hv a tst tomorrow.......

dont leave this question nd if ur sure of the answer, thn pls post the answer....

thnkss..........

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 ?

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.

Describe the structure and functioning of nephrons.

what will happen to the guard cells and stomatal pore when water flows to guard cell ?

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?

which pancreatic enzyme is effective in digesting proteins?

difference between photosynthesis and respiration?

• Take two healthy potted plants which are nearly the same size. 
• Keep them in a, dark room for three days. 
• Now place each plant on separate glass plates. Place a watch-glass containing potassium hydroxide by the side of one of the plants. The potassium hydroxide is used to carbon dioxide. 
• Cover both plants with separate bell-jars as shown in Fig. 6.4. 
• Use vaseline to seal the bottom of the jars to the glass plates so that the set-up is air-tight. 
• Keep the plants in sunlight for about two hours 
• Pluck a leaf from each plant ahd check for the presence-of starch as in the above activty, 
• Do both the leaves show the presence of the same amount of starch? 
• What can you conclude from this activity?

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

Name the three carbon compound formed during anaerobic respiration in muscle.

why blood is called connective tissue?

why in the monocot plants stomata present on both surfaces but indicot plants the stomata are present on the lower surface only? Plz explain!!

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

when do respiration take place in desert plants not photosynthesis(take in carbondioxide and prepare food )

 what happens when all green plants disappear from earth?

how is nutrition in rhizopus different in amoeba ??

what are events occur during photosynthesis?

A sprint runner gets exhausted and falls down after he reaches the finishing line. His muscles develop a lot of pain. Explain the bio-chemical changes occurring in his muscles during the period.pls answer

10 differences between unicellular and multicellular organisms