Mention the unique flowering phenomenon exhibited by Strobilanthus kunthiana (neelakuranaji). 

How does smoking tobacco in human lead to oxygen deficiency in their body? 

3.

A garden pea plant (A) produced inflated yellow pod, and another plant (B) of the same species produced constricted green pods. Identify the dominant traits. 

Why is Eichhornia crassipes nicknamed as Terror of Bengal? 

Write the location and function of the sertoli cells in humans. 

Name the following:

(a) The semi-dwarf variety of wheat is high-yielding and disease-resistant.

Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?

Write what do phytophagous insects feed on

(a) Highlight the role of thymus as a lymphoid organ.

Why do clown fish and sea anemone pair up? What is this relationship called?