The piano is one of the most popular instruments in the world. It is a chordophone which...
The Crow are Native Americans who inhabited the Yellowstone River valley.
Groundwater and aquifers are types of underground waters.
Ports must provide necessary infrastructure and services for industry and marine transport.
Surface epithelia cover the external and internal surfaces of the body
The reproductive system consists of organs which work together for the purpose of...
Freshwater fish used as food in many parts of the world.
Synovial joints can be categorised by the direction of movement they allow.
The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.
Glands of the endocrine system secrete hormones into the blood.
The zygote is the initial cell formed when two gamete cells are joined by means of sexual...
Common ciliated eucaryotic unicellular organisms widespread in freshwaters.
A type of snake with a characteristic spot on its neck.
A species of mollusc widespread in freshwaters.
The anatomy of annelids is demonstrated through the example of the common earthworm.
Jellyfish are free-swimming marine animals, a species of Cnidaria, the most ancient group...
Moles are small subterranean mammals with modified, spade-like forelegs.
The cockchafer (or maybug) is a widespread bug in Europe. Its larvae, known as chafer...
Red deer are even-toed ungulates, ruminants. Their males have spectacular antlers.
The large white butterfly is a common species of butterflies, through which we...