Draw a diagram of human respiratory system and label on it :
(i) Diaphragm (ii) Larynx
What is the name of tiny projections on the inner surface of small intestine which help in absorbing the digested food ?
Draw a neat diagram of excretory system of human beings and label the following:
(i) Kidney
(ii) Ureter
(iii) Urinary Bladder
(iv) Urethra
(a) Draw a sectional view of the human heart and label on it – Aorta, Right ventricle and Pulmonary veins.
(b) State the functions of the following components of transport system:
(i) Blood (ii) Lymph
A Give one reason why multicellular organisms require special organs for exchange of gases between their body and their environment. :
In the experiment "Light is essential for photosynthesis", why does the uncovered part of the leaf turn blue-black after putting iodine solution?
Which of the following type of energy is used by living organisms to perform vital life processes ?
Kinetic energy, Chemical energy, Potential energy, Nuclear energy
Which of the organs perform the following functions in humans ?
(i) Absorption of food
(ii) Absorption of water
(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 ?
(a) What would happen if all the green plants disappear from the earth ?
(b) If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring ? Justify your answer.
Name the process by which plant parts like roots, stems, and leaves get oxygen required for respiration.
In the lungs :
(a) what substance is taken into the body ?
(b) what substance is removed from the body ?
State the three common features of all the respiratory organs like skin, gills and lungs.
Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms ?
Draw a diagram of human excretory system and label renal artery and urethra.
State in brief the function of :
List the three kinds of blood vessels of human circulatory system and write ¦ their functions in tabular form.
a) Leaves of a healthy potted plant were coated with vaseline to block the stomata. Will this plant remain healthy for long? State three reasons for your answer.
(b) State any two differences between autotrophic nutrition and heterotrophic nutrition.
Arrange the following processes involved in the nutrition in animals in the correct order (in which they take place):
Assimilation, Egestion, Ingestion, Absorption, Digestion
Name the enzyme present in human saliva. What type of food material is digested by this enzyme ?
(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) What are autotrophs ? Give one example of autotrophs.
(b) What are the conditions necessary for autotrophic nutrition ?
(a) Photosynthesis converts energy X into energy Y. What are X and Y ?
(b) State the various steps involved in the process of photosynthesis.
