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Biology Test 76
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Biology Test 76
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  • Question 1/10
    1 / -0
    Placenta is the structure formed _______.
    Solutions
    The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood supply, fight against internal infection and produce hormones to support pregnancy.
  • Question 2/10
    1 / -0
    Movement of cell against concentration gradient is called_____.
    Solutions

    • Active transport is the only transport method that can move species against their concentration gradient.

    • Diffusion is the net movement of molecules or atoms from a region of high concentration  to a region of low concentration.

    • Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input.

  • Question 3/10
    1 / -0
    Photosynthesis takes place faster in ______.
    Solutions
    The rate of Photosynthesis is higher in red light while the rate of absorption is highest in the blue light. However, since white light has the full spectrum of colors thus cumulatively it has the highest rate of photosynthesis.
  • Question 4/10
    1 / -0
    Which of the following viruses causes common cold?
    Solutions
    • Common Cold is caused by Rhinovirus.
    • It is a common viral infection of the nose and throat. It is transmitted by virus-infected airborne droplets or by direct contact with infected secretions.
  • Question 5/10
    1 / -0
    One can distinguish a telescope from a microscope by observing
    Solutions
    Another important difference between telescope and microscope is that the focal length or the distance from the focal point to the lens is different in these two scientific instruments.
  • Question 6/10
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    The total number of bones in our body is
    Solutions
    It is composed of 270 bones at birth – this total decreases to 206 bones by adulthood after some bones have fused together. The bone mass in the skeleton reaches maximum density around age 30. The human skeleton can be divided into the axial skeleton and the appendicular skeleton.
  • Question 7/10
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    Grey hair is caused due to
    Solutions
    Gray or white hair—sometimes colloquially called "salt and pepper" when it is 'peppered' throughout dark hair—is not caused by a true gray or white pigment, but is due to a lack of pigmentation and melanin.
  • Question 8/10
    1 / -0
    In our body, antibodies are formed against pathogens in
    Solutions
    Lymphocytes are responsible for the astonishing specificity of adaptive immune responses. They occur in large numbers in the blood and lymph (the colorless fluid in the lymphatic vessels that connect the lymph nodes in the body to each other and to the bloodstream) and in lymphoid organs, such as the thymus, lymph nodes, spleen
  • Question 9/10
    1 / -0
    Lactose is present in
    Solutions

    • Milk is a white liquid which contains nutrients like protein & lactose.

    • Lactose intolerance is the inability of adults to digest lactose, a sugar found in milk and to a lesser extent dairy products, causing side effects

  • Question 10/10
    1 / -0
    The biological decomposition of organic substances in wastes under controlled conditions known as
    Solutions
    Composting is nature's process of recycling decomposed organic materials into a rich soil known as compost. Anything that was once living will decompose. Basically, backyard composting is an acceleration of the same process nature uses.
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