Seeds quiz #3 Flashcards
Seeds quiz #3
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How do monocot and eudicot seeds differ in their germination and early growth?
Eudicot seeds germinate by curving their hypocotyl to push cotyledons above the soil, while monocot seeds push their shoots straight up, with protective structures like the coleorhiza and coleoptile aiding emergence. List and briefly describe the four main types of fruits based on their development.
Simple fruits develop from a single flower with one carpel (e.g., cherry). Aggregate fruits form from a single flower with multiple carpels (e.g., raspberry). Multiple fruits develop from clusters of flowers (e.g., pineapple). Accessory fruits develop from ovary and other tissues (e.g., strawberry). What are the two cells formed when a plant zygote first divides after fertilization?
The zygote divides into an apical cell, which forms the plant embryo, and a basal cell, which forms the suspensor. What is the function of the suspensor in a developing plant embryo?
The suspensor supports the embryo and helps anchor it; only one cell from the suspensor contributes to the embryo itself. How do monocot and eudicot seeds differ in their germination and early growth?
Eudicot seeds germinate by curving their hypocotyl to push cotyledons above the soil, while monocot seeds push their shoots straight up, with protective structures like the coleorhiza and coleoptile aiding emergence. What is the role of the seed coat, and how can it affect germination?
The seed coat protects the seed and may require physical penetration or damage to allow water absorption and trigger germination. Name and briefly describe the four main types of fruits based on their development.
Simple fruits develop from one flower with one carpel; aggregate fruits from one flower with multiple carpels; multiple fruits from clusters of flowers; accessory fruits from ovary and other tissues. What is the pericarp, and what is its significance in fruits?
The pericarp is the part of the fruit that develops from the ovary wall and surrounds the seeds, often forming the edible portion. List three common methods of seed dispersal mentioned in the lesson.
Seeds can be dispersed by wind, water, or animals. What is seed dormancy, and why is it important for plant survival?
Seed dormancy is a period when seeds do not germinate even in suitable conditions, allowing them to wait for the most favorable time to grow.
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