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Life Processes Test - 66

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Life Processes Test - 66
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  • Question 1
    1 / -0
    Mark the correct statement among the following. 
    Solution
    Every organ in our body needs the involvement of circulating fluid. Ex - The digestive system digests & absorb nutrients which are needed to be transported to every cell in the body.
  • Question 2
    1 / -0
    How blood maintains the physiological co-operation of the body?
    Solution
    The main function of the cardiovascular system is, therefore, to maintain blood flow to all parts of the body, to allow it to survive. Veins deliver used blood from the body back to the heart. In the lungs, the blood picks up oxygen that we breathe in and gets rid of carbon dioxide, which we breathe out.

    So, the correct option is 'By circulating from one part to other'.
  • Question 3
    1 / -0
    Which of the following is not a function of lymph?
    Solution
    Lymph supplies oxygen, nutrients, hormones, etc to the cells and removes metabolic wastes from the cells. It destroys microorganisms in the lymph nodes and prevents spreading of infections. It absorbs and transports fat, fat soluble vitamins and minerals from intestine. It maintains the volume of blood. It returns proteins and fluids to the blood. 
    Thus, the correct answer is option D.
  • Question 4
    1 / -0
    The diagram shows how water is lost from leaves.
    By which process is the water lost?

    Solution
    The process by which excess water absorbed by plants, usually through the roots, evaporates into the atmosphere from the plant surface, such as leaf pores or stomata in form of water vapour is known as transpiration.
    So, the correct option is D.
  • Question 5
    1 / -0
    Which of the following is not a product of photosynthesis?
    Solution
    CO2+H2O lightchlorophyll  sugar+oxygenCO_{2} + H_{2}O  \underset {chlorophyll}{\xrightarrow {light}}    sugar + oxygen
    CO2CO_{2} is the raw material for photosynthesis and glucose and oxygen are the products.
  • Question 6
    1 / -0
    Cellular part of lymph contains
    Solution
    Cellular part of lymph contains only leukocytes (mostly lymphocytes) and no blood platelets.
  • Question 7
    1 / -0
    The transport system in plants is made up of
    Solution
    Plants do not move much and have many dead cells in their tissues. Therefore, they do not need much energy. So, they have transport systems slower than those of animals. In plants, the transport system consists of tube like passages made up of vascular tissue. There are two types of vascular tissues in plants-xylem and phloem. 
  • Question 8
    1 / -0
    Which of the following is a life process of plants?
    Solution
    • Plants have tissues such as the xylem and phloem to transport water, nutrients, and minerals. Xylem transports water and other mineral salts, while phloem transports sucrose and amino acids between leaves and other parts of the plant body.
    • Plants utilize the sugars produced during photosynthesis to produce energy for plant growth. This energy production takes place in the mitochondria of the cells. And the process is known as respiration in plants.
    • Waste products such as H2_2O, and O2_2 are excreted through stomata and lenticels. Plants also store wastes in the form of resins and gums. Many plants also release waste products into the surrounding soil.
    • Hence, all the above processes are essential for maintainance of the plant body. 

    So, the correct option is D- All of the above.
  • Question 9
    1 / -0
    Which of the following is an exclusive feature of plants and does not take place in animals?
    Solution
    Excretion and respiration takes place in both animals and plants. But photosynthesis takes place only in plants as they can synthesize their own food from carbon dioxide, water and sunlight. They are also called primary producers.
    So, the correct answer is 'Photosynthesis'.
  • Question 10
    1 / -0
    I.-  Large intestine absorbs salts and water.
    II.- Villi are present in large intestine.
    Solution
    •  By the time food reaches the large intestine, most digestion and absorption have already taken place.
    • The purpose of the large intestine is to absorb remaining water and salts from the material that has not been digested as food
    • In the large intestine, villi, microvilli, and crypts are not present, only small intestine contains tiny projections called villi and microvilli, to increase the total area for absorption.

    So, the correct option is D.
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