The sporozoites that cause infection when a female Anopheles mosquito bites a human being are formed in:a)Salivary glands of mosquitob)Intestine of humanc)Liver of humand)RBCs of mosquitoCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

After 10-18 days, a form of the parasite called a sporozoite migrates to the mosquito's salivary glands. During a blood meal, a malaria-infected female Anopheles mosquito inoculates sporozoites into the human host . Sporozoites infect liver cells and mature into schizonts , which rupture and release merozoites .

Answer

Yes ! sporozoites are formed in salivary glands of female mosquito.... generally for completing life cycle it requires two hosts one man and another female mosquito....

Answer

Correct answer is A

Answer

The sporozoites that cause infection when a female Anopheles mosquito bites a human being are formed in the salivary glands of the mosquito.

Explanation:
When a female Anopheles mosquito bites a human being, it injects saliva into the skin. This saliva contains sporozoites, which are the infective stage of the malaria parasite. These sporozoites are formed in the salivary glands of the mosquito.

Life Cycle of Malaria Parasite:
To understand how sporozoites are formed in the salivary glands of the mosquito, it is important to know the life cycle of the malaria parasite. The life cycle of the malaria parasite involves two hosts - humans and female Anopheles mosquitoes.

1. Human Host:
- The life cycle begins when an infected female Anopheles mosquito bites a human and injects sporozoites into the bloodstream.
- The sporozoites travel to the liver, where they invade liver cells and multiply asexually, forming thousands of merozoites.
- The liver cells eventually rupture, releasing the merozoites into the bloodstream.

2. Mosquito Host:
- When a mosquito bites an infected human, it ingests the merozoites along with the blood.
- Inside the mosquito's stomach, the merozoites develop into male and female gametocytes.
- The gametocytes undergo sexual reproduction, producing male and female gametes.
- The male and female gametes fuse to form a zygote, which develops into a motile form called an ookinete.
- The ookinete penetrates the mosquito's stomach wall and develops into an oocyst.
- Inside the oocyst, multiple rounds of asexual reproduction occur, resulting in the production of thousands of sporozoites.
- These sporozoites migrate to the mosquito's salivary glands, where they accumulate and are ready to be injected into the next human host during a blood meal.

Conclusion:
In conclusion, the sporozoites that cause infection when a female Anopheles mosquito bites a human being are formed in the salivary glands of the mosquito. These sporozoites are produced as a result of the malaria parasite's complex life cycle, involving both human and mosquito hosts.

Answer

All of the following contribute in establishing tension in xylem except
(a) Air bubbles (b) Cohesion properties os water (c) Adhesion properties of water (d) Transpiration

Answer

In NCERT, Page no. 148
sporozoites formed in the intestine but stored in the salivary glands

Answer

The sporozoites are formed in the salivary glands of mosquito because the sexual reproduction takes place in the gut of mosquito ,,and the asexual reproduction in man ,,,

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