It is stiff rod of special cells surrounded by connecive tissue present in the mid -dorsal region and appears in the embryos of all chordates

Related Mcqs:

1. Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of

   A. Diffusion
   B. Passive transport
   C. Osmosis
   D. Active transport

2. A condition in which there is a decrease of oxygen to the tissue despite adequate blood flow to the tissue is_________?

   A. Aphasia
   B. Dysphasia
   C. Hypoxia
   D. None

   Submitted by: Neelam Parri

3. Dorsal root of spinal nerves contain only __________ ?

   A. Effectors neurons
   B. Receptor neurons
   C. Stimulators
   D. Detector neurons

   Submitted by: Rashid Mehmood

4. Vascular Cambium initially appears as actively dividing cells between_________________?

   A. Primary Xylem and secondary xylem.
   B. Primary xylem and secondary phloem.
   C. Primary xylem and primary phloem
   D. Secondary xylem and secondary phloem.

5. The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)

   A. Deffusion
   B. Osmosis
   C. Active transport
   D. None of these

6. Anus is surrounded by _____ types of muscles?

   A. 2
   B. 3
   C. 1
   D. 4

7. Vacuoles are fluid filled sacs surrounded by a membrane called__________?

   A. tonoplast
   B. nuclear membrane
   C. cell membrane
   D. cell wall

   Submitted by: Muhammad Nawaz

8. If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules:

   A. 9
   B. 5
   C. 6
   D. 7

9. If the number of chromosomes in most body cells of a mammal is 40, the cells in the seminiferous tubule will have___________?

   A. 40 chromosomes
   B. 20 chromosomes
   C. 10 chromosomes
   D. While some other will have 20

   Submitted by: Rashid Mehmood

10. There are cells in human body called Faggot cells which cause__________?

    A. AIDS
    B. Tuberculosis
    C. Smallpox
    D. Leukaemia

    Submitted by: Ali Mallah