seed
Definition
A seed is a small, reproductive unit of a plant. It contains an embryo, which is a young plant, and a store of food. The embryo is protected by a hard coat, called the seed coat.
Seeds are important for plant reproduction. When a seed falls to the ground, it can germinate and grow into a new plant. The embryo uses the food in the seed to grow roots and leaves. Once the plant is established, it can make its own food through photosynthesis.
There are many different types of seeds. Some seeds are small and round, while others are large and flat. Some seeds have wings that help them to travel through the air, while others have hooks that help them to attach to animals.
Seeds are an important part of the plant world. They help plants to reproduce and to spread to new areas. Seeds are also an important food source for many animals.
How can the word be used?
The wind scattered seeds from the dandelion.
Different forms of the word
Noun:
- the small, hard part of a plant that can grow into a new plant.
- a source of something new or different.
- a small amount of something that can grow into something larger.
Verb:
- to plant seeds.
- to sow seeds.
- to scatter seeds.
Etymology
The word "seed" comes from the Old English word "sæd", which also means "seed".
The first recorded use of the word "seed" in English was in the 8th century.
The word "seed" is an Old English word, and it is related to the German word "Samen" and the Dutch word "zaad".
Question
What are seeds?
AQA Science Exam Question and Answer
Question:
Explain the vital role of seeds in plant reproduction and the adaptations that enable seeds to disperse and establish new growth.
Answer:
Seeds play a vital role in the reproduction of plants, as they carry and protect the embryonic plant, ensuring its survival and dispersal. The process begins with pollination, where pollen from a male flower part (stamen) reaches the female flower part (pistil) and fertilization occurs, forming a seed within the ovary.
Adaptations in seeds aid in their dispersal and establishment of new growth. Some seeds have structures like wings, hairs, or parachutes that allow them to be carried by wind, such as dandelion seeds. Others have hooks or barbs that cling to animal fur or clothing, facilitating transport. Edible fruits often contain seeds that are dispersed by animals after ingestion.
Additionally, some seeds are adapted for water dispersal, floating and surviving until they reach suitable soil. Others are suited to be buried by animals, providing protection and optimal conditions for germination.
Seed dispersal ensures plants can colonize new areas, reducing competition for resources and increasing genetic diversity. This adaptation enhances the chances of survival for the next generation.