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Class 10 Science Life processes Worksheet

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a. Multiple Choice Questions
b. One Marks Questions
c. Short Answer type
d. Long answer questions

Match the column

Class 10 Science Life processes Practice Worksheet

Class 10 Biology Life processes Practice Worksheet

Answer

(A)(a) — i, (b) — iv, (c) — ii, (d) — iii (B)(a) ->ii ,(b) -> iii,(c) -> i,(d)- > i

Very Short Answer type

Question 1
Why do aquatic animals breath at a faster rate them terristial animals?
Answer
The amount of dissolved O2 in H2O is farely low compared to the amount of O2 in air.

Question 2
Lungs always contain a residual volume of air?
Answer
Lungs always containers a residual volume of air to provide sufficient O2 to be absorbed and CO2 to be released.

Question 3
How are lungs designed in Human Body to maximize the area for exchange of gases?
Answer
There are millions of alveoli present in the lungs. These alveoli provide a very area for the exchange of gases.

Question 4
How are alveoli designed in Human Body to maximize the exchange of gases?
Answer
The extensive network of capalllaiesn [blood vessels] present in the walls of alveoli helps in easy diffusion ie. exchange of gases and provide large surface area for exchange of gases.

Question 5
Which mechanism plays a important role in transportation of water?
i.During Day time
ii.During Night
Answer
i.Transpiration pull
ii.Root pressure

Question 6
What is translocation?
Answer
Transportation of soluble products of photosynthesis or food from leaves to other part of plant is called translocation.

Question 7
What is chyme?
Answer
The slightly digested food, enters the stomach through alimentary canal. In stomach, this food is turned along with gastric juices converting this food into a semi- solid paste called chyme.

Question 8
Name the enzymes, which is present in infants & absent in adults?
Answer
Renin enzyme

Short Answer type

Question 9
What are peristaltic movements?
Answer
The contraction and expansion movements of the walls of food-pipe are called peristaltic movements. This movement pushes the food in forward direction in the alimentary cana

Question 10
How is the small intestine designed to absorb digested food?
Answer
The small intestine is the main region for the absorption of digested food. The inner lining of small intestine has millions of tiny finger-like projections called villi. The presence of villi gives the inner walls of the small intestine a very large surface area for absorption of digested food. The villi are richly supplied with blood vessels which take the absorbed food to each and every cell of the body.

Question 11
Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
Answer
Mammals and birds are warm-blooded animals. They constantly use energy to maintain their body temperature. They have higher energy need and so they require more oxygen to produce energy. Thus, it is important that their oxygenated blood does not get mixed up with deoxygenated blood.

Question 12
What are the components of the transport system in highly organized plants?
Answer
The components of the transport system of highly organized plants consist of xylemand phloem. Xylem consists of tracheids, vessels, xylem parenchyma and xylem fibres. Phloem consists of sieve tubes, companion cells, phloem fibres and phloem parenchyma.

Question 13
How are the alveoli designed to maximize the exchange of gases?
Answer
Thus a large amount of air is brought in contact with the air in the lungs. More than millions of alveoli are present in the lungs. The presence of millions of alveoli in the lungs provides a very large surface area for the exchange of gases. The availability of large surface area maximizes the exchange of gases.

Question 14
What is ascent sap?
Answer
Absorbed water from the soil also contains dissolved minerals (nitrates, phosphates, etc) and hence it is called sap. This sap moves upwards due to the transpiration pull’developed in the xylem elements. Thus, transportation of sap from roots to the leaves at the top is called ascent of sap.

Question 15
What is transpiration pull?
Answer
Water in the mesophyll cells of leaves (cells located below the stomata) is in contact with water or sap in xylem of leaf petiole, stem and root. This water evaporates by the process of transpiration. Thus, due to transpiration water is pulled upward which creates an upward suction force called ‘transpiration pull’.

Question 16
Give reason why the separatice of right & left side of heart is useful to keep oxygenated and deoxygenated blood from mixing.
Answer
Such sepration allows a highly sufficient supply of CO₂ to the blood, this is highly useful in animal that have high energy need, such as birds & mammals which use energy constantly to maintain their body temperature.

Question 17
How is the process of transportation is useful to plants?
Answer
(i)It helps in upward movement of sap or water from roots to leaves.
(ii)it regulates temperature.
(iii)Under the optimum conditions leaf can transpire it’s own weight of water in one hour.

Question 18
What would be the consequences of deficiency of hemoglobin in our body?
Answer
Deficiency of hemoglobin will seriously effect of supply of O2 to the cells causing anemia.

Question 19
What is transpiration pull?
Answer
Due to evaporation of water. Water is pulled upward in the plant which creates an upward suction force called transpiration pull.

Question 20 What is ascent of sap?
Answer
Absorbed water from the soil contains dissolved minerals and hence it is called ascent of sap. Transportation of sap from roots to leaves at the top is called ascent of sap.

Question 21
State the function of epiglottis?
Answer
At the top of the trachea (or wind pipe) there is a flap of cartilage called epiglottis. The function of epiglottis is to cover the mouth of trachea (or wind pipe) when we swallow food so that the food may not enter the trachea (or wind pipe).

Question 22
What is compensation point?
Answer
When the rate of photosynthesis is equal to the respiration, it is called compensation point.

Question 23
What is root pressure?
Answer
it is a pressure developed in the xylem due to metabolic activity of the root cells. It is a hydrostatic pressure developed in the root system that pumps the water or sap in the root xylem.

Question 24
What is photolysis?
Answer
Photolysis, the phenomena of breaking of water molecules using solar energy absorbed by chlorophyll molecule is photolysis.

Long Answer Type

Question 25.
How excretion occur in plants?
Answer
Excretion in plants
The main waste product produced by plants are $CO_2$ and $O_2$ and water vapours. The plants also store some of waste product in their body parts. Some of the plant wastes get stored in the fruits of the plant in the form of social bodies called Raphides. For eg. The fruit called yam [jamikand] has needle shape raphides on its surface.
The various method used by plants to get rid of their waste product are:
(i).Gaseous waste through stomata in leaves & lenticels in stems.
(ii).The plant get rid of stored solid & liquid wastage by sheding of leaves, peeling of Bark and falling of fruits.
(iii).The plants get rid of waste by secreting in the form of gums & rasins.
(iv).Plants also excreate some waste substances into the soil around them.

Question 26
Difference between arteries & veins?
Answer
Class 10 Science Life processes Worksheet

Question 27
What are the differences between the transport of materials in xylem and phlowem?
Answer
Class 10 Science Life processes Worksheet

Question 28
Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
Answer
Class 10 Science Life processes Test paper

Class 10 Science Life processes Test paper

Question 29
(i)Why is energy needed by an organism even during sleep?
(ii) What is osmoregulation? (iii)How the amount of urine produced regulated?
Answer
(i)Because even when an organism is as asleep various biological process keep on occurring in its body which requires energy.
(ii) Osmoregulation is the maintenance of optimum concentration of water & salts in the body fluid.
(iii)The amount of urine produced depends on how much excess H₂O there is in body and or how much of dissolved waste there is to be excreted. More water & dissolved waste in the body will produce more urine and on the other hand less H₂O & less waste will lead to produce less urine.

Question 30
Differentiate between arteries, veins and Capillaries
Answer