Biology Current Affairs 2018

  1. Ordinary table salt is sodium chloride. What is baking soda?
    A. Potassium Chloride
    B. Potassium Carbonate
    C. Potassium Hydroxide
    D. Sodium Bicarbonate
  2. D. Sodium Bicarbonate
  3. What is common to whale, seal and shark?
    A. Homoiothermy
    B. Seasonal Migration
    C. Thick Subcutaneous Fat
    D. Convergent Evolution
  4. D. Convergent Evolution
  5. Movement of cell against concentration gradient is called:
    A. Osmosis
    B. Active Transport
    C. Diffusion
    D. Passive Transport
  6. B. Active Transport
    Active transport this is the only transport method that can move species against their concentration gradient (from low to high concentration). Facilitated diffusion only moves species down their concentration gradient from high to low concentration.

  7. The concept of chemical evolution is based on:
    A. Possible origin of life by combination of chemicals
    B. Crystallization of chemicals under suitable environmental conditions
    C. Interaction of water, air and clay under
    D. Effect of solar radiation of chemicals
  8. A. Possible origin of life by combination of chemicals
  9. Most highly intelligent mammals are:
    A. Whales
    B. Dolphins
    C. Elephants
    D. Kangaroos
  10. B. Dolphins
  11. Pollination is best defined as:
    A. Transfer of pollen from anther to stigma
    B. Germination of pollen grains
    C. Growth of pollen tube in ovule
    D. Visiting flowers by insects
  12. A. Transfer of pollen from anther to stigma
  13. Most fish do not sink in water because of the presence of:
    I. swim bladder
    II. air bladder
    III. air sacs
    IV. air in spongy bones
    A. I and II are correct
    B. II and III are correct
    C. III and IV are correct
    D. I II III and IV are correct
  14. A. I and II are correct
  15. Plants that grow in saline water are called:
    A. Halophytes
    B. Hydrophytes
    C. Mesophytes
    D. Thallophytes
  16. A. Halophytes

  17. Nucleus the genetic material containing rounded body in each cell was first discovered in 1831 by:
    A. Robert Hooke
    B. Robert Brown
    C. Rudolf Virchow
    D. Theodore Schwann
  18. B. Robert Brown
  19. Most of the red blue and purple colours of plants are due to a pigment called:
    A. Anthocyanin
    B. Carotene
    C. Chlorophyll
    D. Xanthophylls
  20. A. Anthocyanin
    Anthocyanin - A blue violet or red flavonoid pigment found in plants.