Search Results for: single-celled
Unicellular
Unicellular organisms are organisms consisting of one cell only that performs all vital functions including metabolism,... 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
Single-celled
If an organism has one cell, they are single celled. Not to be confused with... Read More
Microalgae
Microalgae are microscopic algae. They are single-celled algae that may exist independently or in colonies. They are... 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
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
Sporophyte generation
Definition noun (botany) A phase in the life cycle of certain plants and algae that starts with the union of gametes up to... Read More
Pseudopodia
A pseudopodium (plural: pseudopodia) refers to the temporary projection of the cytoplasm of a eukaryotic cell. Pseudopodia... Read More
Prokaryote
Prokaryote refers to any of the group of organisms primarily characterized by the lack of true nucleus and other... Read More
Ribonucleic acid
Ribonucleic Acid Definition noun (uncountable), ribonucleic acids ri·bo·nu·cle·ic ac·id, raɪboʊnjuːkliːɪk... Read More
Bryophytes
Bryophytes (nonvascular plants) do not have xylem or phloem. The habitations of this plant group are widely varied and... 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
Locomotion
Definition noun The ability of cells or organisms to move and propel itself from place to place Supplement Locomotion in... Read More
Apicomplexa
Definition noun A phylum comprised of protozoans characterized by having a special organelle called an apical complex, and... Read More
Protozoology
Definition noun A branch of biology that studies protozoa, which are eucharyotes characterized by being single-celled, most... Read More
Biological Cell Introduction
It only takes one biological cell to create an organism. In fact, there are countless species of single-celled organisms,... 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
Endosymbiotic theory
Endosymbiotic theory definition noun (evolutionary biology) A theory suggesting that the organelles such as mitochondria... Read More
Animal cell
An animal cell is the fundamental functional unit of life of animals. It is also the basic unit of reproduction. Animal... Read More
Evolution of Life – Ancient Earth
Continuing from the previous tutorial investigating the origins of life on Earth.... Life began to flourish, and the... 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
Green algae
Green algae (singular: green alga) are photosynthetic algae that are characterized by having chlorophylls a and b as the... Read More
Sporozoite
Definition noun, plural: sporozoites A minute, elongated cell that arise from the repeated division of the oocyst during... Read More