Circular disc shaped structure with a round hole is ___________ ?

Related Mcqs:

1. The skeleton of the sponges is in the form of variously shaped needle like structures called___________?

   A. Stripules
   B. Spicules
   C. Brails
   D. Spines

2. Bean shaped cells in plants are_________?

   A. mesophyll cells
   B. xylem cells
   C. phloem cells
   D. guard cells

   Submitted by: Maryam Aftab

3. Bean shaped cells in plants are: _________?

   A. Mesophyll cells
   B. Xylem Cells
   C. Phloem Cells
   D. Guard Cells

   Submitted by: Sajid Hussain Gopang

4. In an annelids, the contraction of circular muscle results in___________?

   A. Lengthening of the body.
   B. Shortening of the body.
   C. Widening of body
   D. Thinning of body

5. A structure formed by groups of similar cells organized into loose sheets or bundles performing similar functions is called as:

   A. An organ
   B. An organism
   C. A Tissue
   D. A Cell

6. Primary structure of proteins determines__________?

   A. Number of polypeptide chains involved
   B. Bending of polypeptide chains
   C. Amino acid sequence
   D. Coiling of polypeptide chains

7. The element in basic structure of proteins which differentiate them from carbohydrates________?

   A. C
   B. S
   C. H
   D. N

8. Which of the following structure primarily helps in attachment of bacteria on various surfaces____________?

   A. Flagella
   B. Pili
   C. Both of these
   D. None of these

9. Which one of the following is avascular structure?

   A. A compact bone.
   B. A spongy bone.
   C. Cartilage
   D. All of these

10. Which of the following structure in plant’s body is called excretophores?

    A. Stem
    B. Leaves
    C. Flowers
    D. Roots