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Science
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Chapter check
Which of the following statements about the autotrophs is incorrect?
In which of the following groups of organisms, food material is broken down outside the body and absorbed?
Select the correct statement
Which is the correct sequence of parts in human alimentary canal?
If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?
The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct one
Which part of alimentary canal receives bile from the liver?
A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains
In which part of the alimentary canal food is finally digested?
Choose the function of the pancreatic juice from the following
When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of
Which of the following statement (s) is (are) true about heart? (i) Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs (ii) Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs (iii) Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts (iv) Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body
What prevents backflow of blood inside the heart during contraction?
Single circulation i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by
In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?
Choose the correct statement that describes arteries.
The filtration units of kidneys are called
Oxygen liberated during photosynthesis comes from
The blood leaving the tissues becomes richer in
Which of the following is an incorrect statement?
The internal (cellular) energy reserve in autotrophs is
Which of the following equations is the summary of photosynthesis?
Choose the event that does not occur in photosynthesis
The opening and closing of the stomatal pore depends upon
Choose the forms in which most plants absorb nitrogen (i) Proteins (ii) Nitrates and Nitrites (iii) Urea (iv) Atmospheric nitrogen
Which is the first enzyme to mix with food in the digestive tract?
Which of the following statement(s) is (are) correct? (i) Pyruvate can be converted into ethanol and carbon dioxide by yeast (ii) Fermentation takes place in aerobic bacteria (iii) Fermentation takes place in mitochondria (iv) Fermentation is a form of anaerobic respiration
Lack of oxygen in muscles often leads to cramps among cricketers. This results due to
Choose the correct path of urine in our body
During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the
