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Southern Gastric Brooding Frog-Image
By: Anna Guerrero
| Published: Feb 06, 2017
The Southern Gastric Brooding Frog (Rheobotrahcus silus) was a frog species that lived in Australia. It was declared extinct in 2002.
EggsFrogsAustraliaTadpolesAmphibians--Larvae
Chloroplasts
By: Anna Guerrero
| Published: Feb 06, 2017
Chloroplasts are the organelles in plant and algal cells that conduct photosynthesis.
ChloroplastsPlastidsChloroplast membranesThylakoidsChlorophyll
Mitochondria - Image
By: Anna Guerrero
| Published: Feb 06, 2017
Mitochondria are organelles found in the cytoplasm of eukaryotic cells. They are composed of an outer membrane and an inner membrane.
Cell organellesMitochondriaEukaryotic cellsMitochondrionOrganelles
DNA and X and Y Chromosomes
By: Anna Guerrero
| Published: Feb 06, 2017
Y-chromosomes exist in the body cells of many kinds of male animals.
Y ChromosomeX chromosomeSex ChromosomesChromosomesSex Chromatin
Jelly Fish and Green Fluorescent Protein
By: Anna Guerrero
| Published: Feb 06, 2017
The crystal jellyfish, Aequorea victoria, produces and emits light, called bioluminescence.
Green fluorescent proteinFluorescent polymersProteinsBiofluorescenceLuminescence
The Y-Chromosome in Animals
By: Dorothy R. Haskett
| Published: May 28, 2015
The Y-chromosome is one of a pair of chromosomes that determine the genetic sex of individuals in mammals, some insects, and some plants. In the…
Y ChromosomeSex ChromosomesEmbryosDNAChromosomes
The Southern Gastric-Brooding Frog
By: Christopher Rojas
| Published: Jan 26, 2015
The Southern Gastric-Brooding Frog (Rheobatrachus silus) was an aquatic frog that lived in south-east Australia. In 2002, the International Union…
Sexual behavior in animalsReproductive BehaviorExtinction (Biology)Extinct animalsCloning
Mitochondria
By: Dorothy R. Haskett
| Published: Jul 05, 2014
All cells that have a nucleus, including plant, animal, fungal cells, and most single-celled protists, also have mitochondria. Mitochondria are…
CellsCell organellesMitochondriaPlant mitochondriaEndosymbiosis
Green Fluorescent Protein
By: Yawen Zou
| Published: Jun 11, 2014
Green fluorescent protein (GFP) is a protein in the jellyfish Aequorea Victoria that exhibits green fluorescence when exposed to light. The protein…
TechnologyGreen Fluorescent Proteins
On the Generation of Animals, by Aristotle
By: Cera R. Lawrence
| Published: Oct 02, 2010
Aristotle's On the Generation of Animals is referred to in Latin as De Generatione animalium. As with many of Aristotle's writings, the exact date of…
LiteratureReproductionPublicationsphilosophy