The most important group of producers in marine ecosystem is of__________?

Related Mcqs:

1. Exoskeleton of a marine snail is composed of________________?

   A. CaPO4
   B. CaCO3
   C. CaSO4
   D. SiO2

2. Most of the marine invertebrates are__________?

   A. Osmoconformers
   B. Osmoregulators
   C. Both depend upon the concentration of sea water
   D. None of these

3. Which of the following marine fishes are considered direct descendents of fresh water ancestors?

   A. Hagfish
   B. Jelly Fish
   C. Star Fish
   D. Bony fishes

4. Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.

   A. Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment
   B. Trimethyl alanine
   C. Ammonia
   D. Trimethylamine oxide

5. If a man having blood group AB marries a woman who is heterozygous for blood group, what is the probability of their first child having blood group B?

   A. 40%
   B. 45%
   C. 50%
   D. 71%

   Submitted by: Rashid Mehmood

6. A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called__________?

   A. Phosphodiester linkage
   B. Glycosidic bond
   C. Peptide bond
   D. Hydrogen bond

7. Ecosystem not found in Pakistan is_____________?

   A. Tropical rain forest
   B. Temperate deciduous forest
   C. Grassland
   D. Tundra

8. The productivity of aquatic ecosystem is basically determined by light and____________?

   A. CO2
   B. O2
   C. Water
   D. Nutrients

9. Which is not recycled in the ecosystem?

   A. Wind
   B. Carbon
   C. Oxygen
   D. Energy

   Submitted by: Amir

10. Human blood is an example of__________?

    A. Organelle
    B. Tissues
    C. Organic compound
    D. Inorganic compounds