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Search Results for: multicellular

A New Theory on the Origin of Animal Multicellularity

Multicellular life, purportedly, started around 600 million years ago. From single-celled, certain organisms eventually... Read More

Organism

An organism refers to a living thing that has an organized structure, can react to stimuli, reproduce, grow, adapt, and... Read More

Protist

Protist Definition What is a protist? All protists are eukaryotes, i.e. organisms with the nucleus. However, they are... Read More

Multicellular

Definition adjective Having or consisting of many cells or more than one cell to perform all vital... Read More

Unicellular

Unicellular organisms are organisms consisting of one cell only that performs all vital functions including metabolism,... Read More

Cell

A cell is a membrane-bound structure that occurs as a functional independent unit of life (such as in unicellular organisms,... Read More

Taxonomy

Taxonomy Definition The term "taxonomy" was developed from two Greek words, "taxis," meaning arrangement, and "nomia,"... Read More

Eukaryote

Eukaryote refers to any of the single-celled or multicellular organisms whose cell contains a distinct, membrane-bound... Read More

Animal

Animal Definition An animal (plural: animals) refers to any of the eukaryotic multicellular organisms of the biological... Read More

Plant

Plant Definition (botany) Any of the eukaryotic organisms of the biological kingdom Plantae, characterized by being... Read More

Multicellularity

Definition noun A condition or state of having or being composed of many cells or more than one cell performing differing... Read More

Green algae

Green algae (singular: green alga) are photosynthetic algae that are characterized by having chlorophylls a and b as the... Read More

The Evolutionary Development of Multicellular Organisms

The beginning of the Cambrian era saw a widespread arrival of multi-cellular organisms, particularly in the form of sponges.... Read More

Algae

Algae are photosynthetic organisms that possess photosynthetic pigments such as chlorophyll. However, they lack true roots,... Read More

Sexual reproduction

Sexual reproduction is a mode of reproduction involving the fusion of haploid female gamete (egg cell) and haploid male... Read More

System

A system pertains to interdependent or interrelated objects comprising and functioning as a whole. In biology, it may refer... Read More

Kingdom

Definition noun, plural: kingdoms In biology, kingdom is a taxonomic rank that is composed of smaller groups called phyla... Read More

Bryophytes

Bryophytes (nonvascular plants) do not have xylem or phloem. The habitations of this plant group are widely varied and... Read More

Eukaryotic cells

Eukaryotic Cells Definition What is a eukaryotic cell? The term “cell” is a common word in biology, anatomy, and... Read More

Clone

Definition noun, plural: clones A propagating population of organisms, either single cell or multicellular, derived from a... Read More

Brown algae

Brown algae are algal species characterized by being multicellular and having brown or greenish brown color. The color is... Read More

Seaweed

A seaweed refers to any of the macroscopic marine algae. They include the conspicuous, multicellular algal species of... Read More

Chlorophyta

Chlorophyta is a taxonomic group (a phylum) comprised of green algae that live in marine habitats. Some of them are found in... Read More

Rhizome

The rhizome is derived from the Greek word rhizoma, meaning "a bunch of roots". Usually, rhizomes are confused with roots;... Read More

Eubacteria

Eubacteria are prokaryotic microorganisms consisting of a single cell lacking a nucleus and containing DNA is a single... Read More

Cloning

Cloning Definition In biology, cloning is the process of producing similar populations of genetically identical individuals... Read More

Living things

Living Things Definition A living things pertains to any organism or a life form that possesses or shows the... Read More

Biogenesis

Definition noun plural: biogeneses (1) The process in which life forms arise from similar life forms (2) A theory that... Read More

Zygote

Zygote Definition What is a zygote? A zygote is a fertilized eukaryotic cell. In biology, medical science, and other allied... Read More

Cell culture

Definition noun, plural: tissue cultures (1) The technique of cultivating cell strains or lines, especially animal cells, in... Read More

Life

Life Definition noun, plural: lives (1) A distinctive characteristic of a living organism from dead organism or non-living... Read More

Genetic Control – On and Off Genes

Reviewed by: Mary Anne Clark, Ph.D. This lesson looks at the various factors involved that affect growth and... Read More

Binary fission

Binary fission definition What is binary fission? In biology, binary fission is a type of asexual reproduction where a... Read More

Internal environment

Definition noun (1) The outside of the cells inside the body of an organism. (2) The extracellular fluid... Read More

Chemotaxis

Definition noun The directional movement of an organism or a living motile cell in response to certain diffusible chemicals... Read More

Mitosis

Mitosis Definition What is mitosis? In biology, mitosis refers to the cellular process where a single cell divides... Read More

Tissue

Tissue Definition What is tissue in the body? The body tissue is an aggregation of cells that function together and have a... Read More

Organ culture

Definition noun, plural: tissue cultures (1) The technique of cultivating organ primordia or pieces of tissue in the... Read More

Microalgae

Microalgae are microscopic algae. They are single-celled algae that may exist independently or in colonies. They are... Read More

Locomotion

Definition noun The ability of cells or organisms to move and propel itself from place to place Supplement Locomotion in... Read More