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Published on: 26/08/2019
Life Process
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1.
Cramps caused during sudden activities are due to the formation of
Ethanol
Acetic acid
Lactic acid
Excess of water
2.
Green dots present on a leaf are cell organelles called
Chlorophyll
Chloroplast
Stomach
Veins
3.
Complete digestion of carbohydrates, proteins and fats takes place in
Stomach
Large intestine
Small intestine
Villi
4.
Deoxygenated blood enters the heart through
Right ventricle
Right atrium
Light ventricle
Left atrium
5.
Which of the following statements about the autotrophs is incorrect?
They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
They store carbohydrates in the form of starch
They convert carbon dioxide and water into carbohydrates in the absence of sunlight
They constitute the first trophic level in food chains
6.
The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
Cytoplasm
Mitochondria
Chloroplast
Nucleus
7.
The autotrophic mode of nutrition requires
Carbon dioxide and water
Chlorophyll
Sunlight
All of the above
8.
The xylem in plants is responsible for
Transport of water
Transport of food
Transport of amino acids
Transport of oxygen
9.
The kidneys in human beings are a part of the system for
Nutrition
Respiration
Excretion
Transportation
10.
Name the excretory unit of a kidney
11.
Name the term for transport of food from leaves other parts of the plant.
12.
What is meant by 'translocation' with respect to transport in plants?
13.
Why is respiration considered an exothermic process?
14.
How do autotrophs obtain CO2 and N2 to make their food?
1.
(b)
Acetic acid
2.
(b)
Chloroplast
3.
(c)
Small intestine
4.
(b)
Right atrium
5.
(c)
They convert carbon dioxide and water into carbohydrates in the absence of sunlight
6.
(b)
Mitochondria
7.
(d)
All of the above
8.
(a)
Transport of water
9.
(c)
Excretion
10.
The uriniferous tubule, or nephron, is the kidney's excretory unit.
Excretion is the process in which an organism's hazardous waste is removed from its body.
The nephron is the fundamental unit of homeostasis, as it is controls the amount of water, ions and other substances in the blood.
Nephron's key tasks include blood filtration, reabsorption, secretion, and urine production.
11.
Translocation
12.
The transport of food from the leaves to the different parts of the plant is called translocation.
13.
Respiration involves the breaking down of digested food using oxygen.As respiration produces a lot of energy in the form of ATP, this process is exothermic in nature.
14.
CO2 is obtained from leaves through stomata pores and N2 is obtained in combined form, e.g. nitrates, through roots in dissolved form.
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