7th Grade > Biology
TRANSPORTATION IN ANIMALS AND PLANTS MCQs
Total Questions : 111
| Page 9 of 12 pages
Answer: Option D. ->
Water
:
D
Plasma is the fluid component of the blood. It is derived when all the blood cells - red blood cells, white blood cells and platelets are separated from whole blood. The remaining straw-coloured fluid is 90–92 percent water and dissolved nutrients, proteins, waste products and hormones.
:
D
Plasma is the fluid component of the blood. It is derived when all the blood cells - red blood cells, white blood cells and platelets are separated from whole blood. The remaining straw-coloured fluid is 90–92 percent water and dissolved nutrients, proteins, waste products and hormones.
Answer: Option D. ->
Fishes
:
D
All the nitrogenous wastes in the fishes are converted into ammonia before it is excreted out into the water. This ammonia directly dissloves in the water. Birds and lizards excrete nitrogenous wastes as uric acid. The excretory product in humans is urea.
:
D
All the nitrogenous wastes in the fishes are converted into ammonia before it is excreted out into the water. This ammonia directly dissloves in the water. Birds and lizards excrete nitrogenous wastes as uric acid. The excretory product in humans is urea.
Answer: Option D. ->
capillaries
:
D
Arteries transport oxygenated blood to all parts of the body form the heart. On reaching the tissues, arteries divide into capillaries. After delivering oxygen, now the capillaries join to form veins. The veins carry the carbon dioxide rich blood to the heart.
:
D
Arteries transport oxygenated blood to all parts of the body form the heart. On reaching the tissues, arteries divide into capillaries. After delivering oxygen, now the capillaries join to form veins. The veins carry the carbon dioxide rich blood to the heart.
Answer: Option A. ->
It removes wastes
:
A and B
:
A and B
Sweat is composed of mainly water, excess salts and urea, which need to be removed from the body as waste. Its main function is to control body temperature. As the water in the sweat evaporates, the surface of the skin cools. Thus sweat removes waste from the body and cools it down as well.
Answer: Option C. ->
Chest cavity
:
C
The heart is located in the chest cavity, also called thoracic cavity. It is protected by the rib cage. Chest cavity also houses the lungs.
:
C
The heart is located in the chest cavity, also called thoracic cavity. It is protected by the rib cage. Chest cavity also houses the lungs.
Answer: Option A. ->
Hydra
:
A and B
Animals such as hydra and sponges do not posses a circulatory system. The water in which they live, brings in food and oxygen as they enter their bodies. When this water moves out of the body, it carries away waste materials and carbon dioxide away from the body.
:
A and B
Animals such as hydra and sponges do not posses a circulatory system. The water in which they live, brings in food and oxygen as they enter their bodies. When this water moves out of the body, it carries away waste materials and carbon dioxide away from the body.
Answer: Option A. ->
Hydra
:
:
Circulation of blood is essential for the transportation of nutrients and oxygen to various parts of the body. It also transports waste for removal from the body.
Answer: Option A. ->
Hydra
:
:
Each point: 1 Mark
Root hairs are the hair-like outgrowths of a plant root.
They are the tubular extensions of the epidermis that greatly increase the surface area of the root. This increases the amount of water and nutrients that the plant can absorb from the soil.
Answer: Option A. ->
Hydra
:
:
Each point: 1 Mark
Blood vessels carry blood to different parts of the body.
There are three major types of blood vessels.
a. The arteries, which carry blood away from the heart
b. The capillaries, which enable the actual exchange of oxygen and nutrients between the blood and the cells
c. The veins, which carry blood from the capillaries back towards the heart.
Answer: Option A. ->
Hydra
:
Each component: 0.5 Marks
The components of blood are:
(i) Plasma
(ii) Red blood cells (RBC)
(iii) White blood cells (WBC)
(iv) Platelets
:
Each component: 0.5 Marks
The components of blood are:
(i) Plasma
(ii) Red blood cells (RBC)
(iii) White blood cells (WBC)
(iv) Platelets
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