Table of Contents
Are seeds unicellular?
Seeds are multicellular whereas spores are unicellular. Seeds are the units of sexual reproduction while spores are the units of asexual reproduction. Seeds are developed by the process of mitosis from the ovules with other fertilized egg cells whereas spores are developed by the process of meiosis of the sporophyte.
Is the seed of a plant an organism?
Viable seeds are living entities. They must contain living, healthy embryonic tissue in order to germinate. All fully developed seeds contain an embryo and, in most plant species, a store of food reserves, wrapped in a seed coat.
Are seeds multicellular embryos?
…a new sporophyte generation—the multicellular embryo of the seed. Food for the developing embryo is provided by the massive starch-filled female gametophyte that surrounds it. … is formed, and the young embryo then grows downward within the female gametophyte tube toward the cellular female gametophyte.
Are seeds diploid or haploid?
The seeds produced by the sporophyte contain: A seed coat of diploid tissue from the original diploid parent. A developing diploid embryo inside which began as a zygote after fertilization of the haploid egg by a haploid sperm.
Are seeds asexual reproduction?
Plants have two main types of asexual reproduction: vegetative reproduction and apomixis. Some plants can produce seeds without fertilization. Either the ovule or part of the ovary, which is diploid in nature, gives rise to a new seed. This method of reproduction is known as apomixis.
Are seeds abiotic or biotic?
A seed is the embryo of a new plant and as such is a living thing ,but in a dormant state, which requires being buried in soil or other suitable matter to trigger off the renewal process.
Do seeds have homeostasis?
During a study of the utilization of endogenous phytate by germinating wheat seeds (Matheson and Strother, 1969), it was shown that if the inorganic phosphate content of seedlings is expressed on a f. Brown Mignonette) a similar homeostasis exists as germination proceeds.
Is a seed a sporophyte or gametophyte?
The nutritive tissues inside the seed are actually the haploid body cells of the female gametophyte. The seed also contains the developing diploid sporophyte, the little embryonic conifer. The outer wrapping of the seed, the tough and protective seed coat, is formed from the diploid cells of the parent sporophyte.
What is a seed biology?
A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth with in the motherplant.
Is the seed of a Gymnosperm haploid or diploid?
Gymnosperms are unique plants because they produce naked seeds. This alternation of generations in gymnosperms, such as pine trees, means that there are multicellular stages that are haploid and diploid.