Question

Recognise the figure and find out the correct matching.

• A. $d$—gametocytes, $a$—sporozoites, $b$—asexually, $c$—sexually
• B. $d$—gametocytes, $a$—sporozoites, $b$—asexually, $c$—asexually
• C. $a$—gametocytes, $d$—sporozoites, $c$—asexually, $b$—sexually
• D. $a$—gametocytes, $d$—sporozoites, $c$—asexually, $b$—sexually

Answer 1

The correct option is B $d$—gametocytes, $a$—sporozoites, $b$—asexually, $c$—asexually

Introduction to the life cycle of $Plasmodium$

Life Cycle of $Plasmodium$ occurs in two phases, one phase occurs in the female $Anopheles$ $mosquito$, whereas the other phase occurs in the human body.

Sporozoites

$Plasmodium$ enters the human body as sporozoites (infectious form) through the bite of an infected mosquito. Label a is sporozoites.

Merozoites

The sporozoites are carried by the blood to the liver in human, where they mature into structures called schizonts.
Each schizont multiplies to form merozoites.

Gametocytes

Gametocytes are sexual precursors that are transmitted from human being to $Plasmodium$.

These are developed in the RBC of human beings. Label d is gametocytes.

Reproduction modes

Sporozoites get modified into merozoites asexually in liver.

These merozoites further modify and enter RBCs and reproduce there asexually too. Thus label b and c is asexually.

Final answer

(d.) $d$—gametocytes, $a$—sporozoites, $b$—asexually, $c$—asexually