During human embryonic development, the formation of the primitive streak marks a crucial step. Which of the following statements regarding the primitive streak is INCORRECT?

The archenteron in a developing gastrula will eventually give rise to which structure in the adult organism?

During embryonic development, the formation of the three germ layers (ectoderm, mesoderm, and endoderm) is known as:

A mutation affects the function of the Hox genes in a developing Drosophila embryo. Which of the following is the MOST likely consequence?

Unlike the formation of vascular tissues from procambium, the development of interfascicular cambium from parenchyma cells represents:

Which one is the example of dedifferentiation?

The process by which cells loose their specialisation is called

Which of the following statements are correct?

I. A multicellular organism is composed of mainly three types of cells

II. Undifferentiated cells are stem cells and are unspecialised cells, which usually possesses the power of division

III. Differentiated cells are post-mitotic cells and are specialised to perform specific functions

IV. Dedifferentiated cells are differentiated cells which revert to undifferentiated state to take over the function of division

Differentiation in plants is open because

Heterophylly can be observed in

I. cotton

II. coriander

III. larkspur

Select the right option

I. Increased vacuolation

II. Cell enlargement

III. New cell wall deposition

Which of the above are the characteristics of phase of elongation?

Choose the correct option accordingly