CG Board Class 7 Science Transportation in Living Organisms question answers , fill in the blanks , true false etc. for your exams.
Choose the correct answer-
1. Transportation in unicellular animals is
(a) by closed transportation (b) by absorption
(c) by diffusion (d) by distillation
Answer – (c) by diffusion
2. Transportation in human beings is
(a) through water (b) through muscles
(c) through nerves (d) through blood
Answer – (d) through blood
3. Main part of blood transportation system in human beings is
(a) heart (b) Capillaries
(c) Arteries (d) Veins
Answer – (a) heart
4. In non-chordate animals, circulation of blood is
(a) closed circulation (b) open circulation
(c) Both open and closed circulations (d) none of these
Answer – (b) open circulation
5. The meaning of deficiency of blood in the body of a human being is-
(a) deficiency of blood in the body
(b) deficiency of plasma in blood
(c) deficiency of white blood cells in blood
(d) deficiency of haemoglobin in red blood cells
Answer – (a) deficiency of blood in the body
Fill in the blanks:-
1. When we cut the bark of a stem then with it ……………..is also destroyed along with it.[phloem]
2. Blood is a ……………tissue. [connective]
3. …………….help in clotting of blood. [platelets]
4. Oxygenated blood is circulated to all body parts through …………..[arteries]
5. ………………….. blood is brought to the heart from all body parts through veins.[deoxygenated]
Correct the following statements :-
1. Chordate animals have open blood circulation.
Correction: Chordate animals have closed blood circulation.
2. Blood donation is required for saving the life of a healthy man.
Correction: Blood donation is required for saving the life of a person in need, not necessarily a healthy man.
3. Pressure of blood in veins is called blood pressure.
Correction: Blood pressure is the pressure of blood in arteries, not veins.
4. Capillaries join together to make small vessels.
Correction: Capillaries join together to form larger vessels, known as veins.
