Name the substance whose build up in the muscles during vigorous physical exercise may cause cramps.
Lactic acid.
(a) What are heterotrophs ? Give one example of heterotrophs.
(b) What is the difference between autotrophic nutrition and heterotrophic nutrition ?
(a) What is chlorophyll ? What part does chlorophyll play in photosynthesis ?
(b) (i) Which simple food is prepared first in the process of photosynthesis ?
(ii) Name the food which gets stored in plant leaves.
Name the substance whose build up in the muscles during vigorous physical exercise may cause cramps.
(a) Draw a diagram of excretory system in human beings and label the following parts. Aorta, kidney, urinary bladder and urethra.
(b) How is urine produced and eliminated ?
Name the intermediate and the end products of glucose breakdown in aerobic respiration.
Name the component of blood that helps in the formation of blood clot in the event of a cut.
Apart from sunlight and chlorophyll, what other things are required to make food by photosynthesis ?
All the animals can be divided into three groups on the basis of their eating habits. Name the three groups.
Define (i) saprophytic nutrition (ii) parasitic nutrition, and (iii) holozoic nutrition. Give one example of each type.
What are the differences between aerobic and anaerobic respiration ? Name some organisms that use anaerobic mode of respiration.
Write correct sequence of four steps of method for the preparation of temporary mount of a stained leaf peel.
Draw a diagram of human excretory system and label renal artery and urethra.
State in brief the function of :
(a) What is meant by breathing? What happens to the rate of breathing during vigorous exercise and why?
(b) Define translocation with respect to transport in plants. Why is it essential for plants? Where in plants are the following synthesised?
(i) Sugar (iii) Hormone
(a) Name the pigment in leaves which absorbs sunlight energy.
(b) What is the colour of this pigment ?
What is the scientific name of the animals which are :
(i) only meat eaters ?
(ii) only plant eaters ?
(iii) both, plant and meat eaters ?
(a) What criteria can be used to decide whether something is alive ?
(b) What is meant by life processes ? Name the basic life processes common to all living organisms which are essential for maintaining life.
(a) Photosynthesis converts energy X into energy Y. What are X and Y ?
(b) State the various steps involved in the process of photosynthesis.
(a) Which part of the body secretes bile ? Where is bile stored ? What is the function of bile ?
(b) What is trypsin ? What is its function ?
Describe the process of respiration in the following parts of a plant :
(a) Root (b) Stem (c) Leaves
(a) What is meant by aquatic animals and terrestrial animals ?
(b) From where do the aquatic animals and terrestrial animals obtain oxygen for breathing and respiration ?
Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms ?