Seed - Wikipedia
网页In botany, a seed is a plant embryo and food reserve enclosed in a protective outer covering called a seed coat (testa). More generally, the term "seed" means anything that can be sown, which may include seed and husk or tuber. Seeds are the product of the ripened ovule, after the embryo sac is fertilized by sperm from pollen, forming a zygote ...
Seed | Form, Function, Dispersal, & Germination | Britannica
网页2024年8月30日 · seed, the characteristic reproductive body of both angiosperms (flowering plants) and gymnosperms (e.g., conifers, cycads, and ginkgos). Essentially, a seed consists of a miniature undeveloped plant (the embryo), which, alone or in the company of stored food for its early development after germination, is surrounded by a protective coat (the ...
What Is a Seed? - New York Botanical Garden
网页2021年4月2日 · The seed is the embryonic stage of the plant life cycle. Most seeds consist of three parts: embryo, endosperm, and seed coat. The embryo is a tiny plant that has a root, a stem, and one or more leaves. The endosperm is the nutritive tissue of the seed, often a combination of starch, oil, and protein.
Seed Definition & Meaning - Merriam-Webster
网页2012年8月9日 · : the fertilized ripened ovule of a flowering plant containing an embryo and capable normally of germination to produce a new plant. broadly : a propagative plant structure (such as a spore or small dry fruit) : a propagative animal structure: (1) : milt, semen. (2) : a small egg (as of an insect) (3)
SEED中文(简体)翻译：剑桥词典 - Cambridge Dictionary
网页seed noun (PLANT) Add to word list. B2 [ C or U ] a small, round or oval object produced by a plant and from which, when it is planted, a new plant can grow. 种子. Sow the seeds (= put them in the ground) about three centimetres deep. 把这些种子种进约3厘米深的地方。.
What is a seed? Definition, Function, Structure and Components
网页2023年8月31日 · A seed is the small, matured reproductive structure produced by plants, typically containing an embryo or young plant inside. Seeds are a crucial part of a plant’s life cycle as they serve as a means of reproduction and dispersal. They contain all the necessary nutrients and genetic information …
seed - Kids | Britannica Kids | Homework Help
网页A seed contains a miniature plant, called an embryo, that can develop into a fully grown plant. The outer shell of a seed, called a seed coat, protects the embryo. Inside the seed a nutritious material provides food to the embryo. In flowering plants this …
Seed Definition and Examples - Biology Online Dictionary
网页2021年7月28日 · A seed is a fertilized ovule containing the plant embryo. Given the appropriate growth conditions, it will become the new plant. Thus, it is also regarded as the propagating organ particularly of spermatophytes (i.e. gymnosperms and angiosperms). Plants such as ferns, mosses, and liverworts do not produce seeds
How Does A Seed Grow Into A Plant? - Science ABC
网页2023年10月19日 · The process by which a seed transforms into a plant (seedling) in optimum sunlight, air, and water is called germination. The seed can grow within its range of minimum and maximum temperatures. Any temperature above this range can either damage the seeds or make them dormant.
SEED | English meaning - Cambridge Dictionary
网页a small, round or oval object produced by a plant and from which, when it is planted, a new plant can grow: Sow the seeds (= put them in the ground) about three centimetres deep. …