Olympiad Test: Transport And Excretion -2

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This mock test of Olympiad Test: Transport And Excretion -2 for Class 7 helps you for every Class 7 entrance exam. This contains 10 Multiple Choice Questions for Class 7 Olympiad Test: Transport And Excretion -2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Olympiad Test: Transport And Excretion -2 quiz give you a good mix of easy questions and tough questions. Class 7 students definitely take this Olympiad Test: Transport And Excretion -2 exercise for a better result in the exam. You can find other Olympiad Test: Transport And Excretion -2 extra questions, long questions & short questions for Class 7 on EduRev as well by searching above.

QUESTION: 1

The droplets of water arranged at the edges of leaves of roses in the morning are

A.
water transpired from the stomata and lenticels.
B.
water drops condensed from the atmosphere during night at low temperatures.
C.
water produced on the leaves from the reaction of hydrogen and atmospheric oxygen.
D.
none of the above.

Solution:

The droplets of water arranged at the edges of leaves or flower in the morning is due to water transpired from stomata and lenticels.

QUESTION: 2

Plants store waste materials in

A.
vacuoles
B.
old leaves
C.
(a) and (b)
D.
none of the above

Solution:

QUESTION: 3

When the muscles of the heart contract

A.
blood flows from the lungs into the left auricle
B.
blood is pumped into the right auricle from all over the body
C.
blood is pumped from the right ventricle into the lungs
D.
none of the above

Solution:

QUESTION: 4

When the muscles of the heart relax,

A.
blood is pumped into the right auricle from all over the body
B.
blood flows from lungs into the left auricle
C.
both (a) and (b)
D.
blood flows from the left ventricle to the rest of the body.

Solution:

QUESTION: 5

Blood from the left ventricle is pumped to

A.
left auricle
B.
right auricle
C.
all parts of the body
D.
lungs

Solution:

QUESTION: 6

Match the following

A.
1 - A, 2 - C, 3 - D, 4 - B
B.
1 - D, 2 - C, 3 - B, 4 - A
C.
1 - C, 2 - D, 3 - B, 4 - A
D.
1 - D, 2 - C, 3 - A, 4 - B

Solution:

-Major function of the kidneys is to remove waste products and excess fluid from the body. These waste products and excess fluid are removed through the urine. The production of urine involves highly complex steps of excretion and re-absorption.

-Blood carries oxygen and other important nutrients that all body organs need to stay healthy and to work properly. Our heart is a muscle, and its job is to pump blood throughout your circulatory system.

-our lungs are part of the respiratory system, a group of organs and tissues that work together to help us breathe. The respiratory system's main job is to move fresh air into our body while removing waste gases.

-The stomach is a hollow organ, or "container," that holds food while it is being mixed with stomach enzymes. These enzymes continue the process of breaking down food into a usable form. Cells in the lining of the stomach secrete a strong acid and powerful enzymes that are responsible for the breakdown process.

QUESTION: 7

In potato experiment, sugar level inside potato is increased due to

A.
sugar solution absorbs water
B.
movement of water from outside to inside
C.
potato containing stored water
D.
there is no change

Solution:

QUESTION: 8

______ is the flow of water molecules from the region of higher water pressure to the region of lower water pressure through a semipermeable membrane.

A.
diffusion
B.
transpiration
C.
osmosis
D.
none of these

Solution:

Osmosis is the flow of water molecules from the region of higher water pressure to lower water pressure through a semipermeable membrane is called osmosis.

QUESTION: 9

______ animals excrete ammonia in gaseous form.