Definition Of Definitive Nucleus

See also double fertilization. Noun plural -clei -klɪˌaɪ or -cleuses.

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Nucleus- a part of the cell containing DNA and RNA and responsible for growth and reproduction.

Definition of definitive nucleus. The term was coined in 1844 by Michael Faraday to describe the center of an atom. A male gamete released from the pollen tube may fuse with this to form the triploid primary endosperm nucleus from which the endosperm develops. All nuclei are positively charged because of the presence of protons.

These paintings will form the nucleus of a new collection. In chemistry a nucleus is the positively charged center of the atom consisting of protons and neutrons. A small particle as of dust upon which water vapor condenses in the atmosphere.

A nucleus is defined as a double-membraned eukaryotic cell organelle that contains the genetic material. Chemistry The positively charged central region of an atom composed of protons and neutrons and containing most of the mass of the atom. A usually round part of most cells that is enclosed in a double membrane controls the activities of the cell and contains the chromosomes.

The diploid nucleus found in the centre of the embryo sac after the fusion of the two haploid polar nuclei. A nucleon is one of the subatomic particles of the nucleus of an atom. Consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail.

Kernel the nucleus of an idea. The nucleus is a membrane-bound organelle that contains genetic material DNA of eukaryotic organisms. Definition of condensation nucleus.

Its also known as the atomic nucleus. A small oval structure in the temporal lobe of the brain that is closely connected to the hypothalamus the hippocampus and the cingulate gyrus. The exception is the most fundamental and smallest of all atoms hydrogen-1 whose nucleus consists of a single proton.

These two people will form the nucleus of a new management team to promote sales in. Kids Definition of nucleus. The contents are collectively referred to as nucleoplasm.

Each atomic nucleus can contain one or more Nucleons and these nucleons are surrounded by one or more electrons. Its the largest organelle inside the cell taking up about a. A nucleus diagram highlighting the various components.

The nucleus of a city. A spheroid body within a cell contained in a double membrane the nuclear envelope and containing the chromosomes and one or more nucleoli. Noun the command center of an animal or plant cell.

The number of protons determines the chemical element. Nucleons occupy a very small space within the nucleus. The central part of something People or things that form the nucleus of something are the most important part of it.

ˈnjuːklɪəs. The nucleus of my body is the brain. It was named the amygdaloid nucleus because anatomists thought it was shaped like an.

The positively charged central region of an atom composed of one or more protons and for all atoms except hydrogen one or more neutrons containing most of the mass of the atom. Nucleus noun astronomy the center of the head of a comet. Cell- biology the basic structural and functional unit of all organisms.

The central part of something around which other parts are located or collected. Nearly all nuclei contain both protons and neutrons. See more at atom.

Moreover only eukaryotes have the nucleus prokaryotes have the nucleoid. British Dictionary definitions for nucleus. They may exist as independent units of life as in monads or may form colonies or tissues as in higher plants and animals.

A central or essential part around which other parts are gathered or grouped. A centre of growth or development. Biology The structure in the cytoplasm of a living cell that contains the cells DNA and controls its metabolism growth and reproduction.

From Latin literally kernel inner part diminutive of nux nuc- nut. The word nucleus comes from the Latin word nucleus which is a form of the word nux which means nut or kernel. A central or fundamental part or thing around which others are grouped.

The amygdaloid nucleus is part of the olefactory and limbic systems and plays a role in the sense of smell motivation and emotional behavior. As such it serves to maintain the integrity of the cell by facilitating transcription and replication processes.

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