Hydrozoa
(Science: zoology) The Acalephae; one of the classes of coelenterates, including the hydroidea, discophora, and siphonophora.
Origin: NL, fr. E. Hydra – gr. An animal.
Dictionary > Hydrozoa
You will also like...
Chromosomes X and Y and Sex Determination
This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..
Homeostasis of Organism Water Regulation
Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..
ATP & ADP – Biological Energy
ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..
Growth and Plant Hormones
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..
Chromosome Mutations – II
This tutorial is a continuation of the first lesson on chromosomal mutation. Here, find out the chromosomal aberrations ..
The Conscious & Unconscious Nervous System
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..