**Question:** Transovarian transmission is seen in

A. Infection
B. Nutrient transport
C. Reproduction
D. Seed dispersal

**Core Concept:** Transovarian transmission refers to the movement of substances (e.g., pathogens, nutrients, or seeds) from the mother to the offspring within the reproductive organs (oocytes or eggs).

**Why the Correct Answer is Right:** The correct answer, D. Seed dispersal, is related to transovarian transmission because seeds are produced within the reproductive system (ovaries or ovaries) of plants and are dispersed away from the mother plant for the purpose of reproduction.

**Why Each Wrong Option is Incorrect:**

A. Infection (Option A) is incorrect because transovarian transmission typically involves the movement of substances rather than pathogens. Infection typically occurs through external entry points like skin or mucous membranes, not transovarian pathways.

B. Nutrient transport (Option B) is incorrect because transovarian transmission primarily involves the movement of substances, not nutrients specifically. Nutrients are generally transported via blood vessels or other pathways within the organism.

C. Reproduction (Option C) is not the correct answer because while transovarian transmission does contribute to reproduction, it is a specific mode of substance transport within the reproductive system, not the broader concept of reproduction itself.

**Clinical Pearl / High-Yield Fact:** Transovarian transmission plays a crucial role in plant reproduction, allowing for the dispersal of seeds and ensuring genetic diversity. This concept is essential for understanding plant biology and ecology, particularly in the context of agriculture, conservation, and plant evolution.

**Correct Answer:** D. Seed dispersal