Previous years question of chapter 1 biology class 10th : PYQ's of chapter life processes class 10th
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Here you will get answers to every question asked by CBSE in the examination.
Q1). Write in brief the function of the following structure.
PYQ's of chapter life processes class 10th
Q1). Write in brief the function of the following structure.
Ureter, kidney, urethra and urinary bladder
Answer:- ureter - it is a tube that carries urine from the kidney to the urinary bladder.
Kidney - it removes wastes such as urea and excess water from the blood.
Urethral - it is a tube through which urine is passed out from the body.
Urinary bladder - it acts as a reservoir that stores urine before it is discharged out from the body.
Q2). What is the function of gastric juices?
Answer:- Please scroll down to see the answer.
Q3). The autotropic mode of nutrition requires.
Answer:- carbon dioxide, water, chlorophyll and sunlight.
Q4). How is the small intestine designed to absorb digestive food?
Answer:-The small intestine has numerous finger-like projections called villi on its inner lining. The villi increase the surface area for absorption. They are richly supplied with blood vessels and the absorbed food and nutrients are transferred to the blood, which takes the absorbed food to every cell of the body. Thus, the small intestine efficiently absorbs digested food.
Q5). Explain systolic and diastolic pressure?
Answer:-
Systolic: maximum pressure in which blood is moved in the contraction of heart Contraction is called systolic pressure.
Diastolic: Relaxation of cardiovascular muscles is called diastolic pressure.
Q6). Why it is 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 needs and so they require more oxygen to produce energy. Thus, their oxygenated blood should be separated from deoxygenated blood.
Q7). Name two stages in photosynthesis?
Answer:- light stage and dark stage.
Q8). Draw a diagram to show the nutrition in amoeba.
Answer:- Please scroll down to see the answer.
Q9). State two differences between breathing and respiration?
Answer:-please scroll down to see the answer.
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