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Also in the head are two eyespots in the brain, and several sensory cirri and pairs of hollow antenna-like clavae which may be chemoreceptors. [ 3 ] The tardigrade Dactylobiotus dispar can be trained by classical conditioning to curl up into the defensive 'tun' state in response to a blue light associated with a small electric shock, an ...
Sirenians grow to between 2.5 and 4 metres (8.2 and 13.1 feet) in length and 1,500 kilograms (3,300 pounds) in weight. The recently extinct Steller's sea cow was the largest known sirenian to have lived, reaching lengths of 10 metres (33 feet) and weights of 5 to 10 tonnes (5.5 to 11.0 short tons).
[6]: 3 Lichens do not have roots that absorb water and nutrients as plants do, [15]: 2 but like plants, they produce their own energy by photosynthesis. [16] Instead, lichen absorb nutrients from rainwater and the air. [17] When they grow on plants, they do not live as parasites, but instead use the plant's surface as a substrate.
Spider wasps paralyse and eventually kill their hosts, but are considered parasitoids, not predators.. At the most basic level, predators kill and eat other organisms. However, the concept of predation is broad, defined differently in different contexts, and includes a wide variety of feeding methods; moreover, some relationships that result in the prey's death are not necessarily called pre
The thylakoids of cyanobacteria use the energy of sunlight to drive photosynthesis, a process where the energy of light is used to synthesize organic compounds from carbon dioxide. Because they are aquatic organisms, they typically employ several strategies which are collectively known as a "CO 2 concentrating mechanism" to aid in the ...
P. semilanceata, like all others species of the genus Psilocybe, is a saprobic fungus, [37] [38] meaning it obtains nutrients by breaking down organic matter. The mushroom is also associated with sedges in moist areas of fields, [ 22 ] and it is thought to live on the decaying root remains.
Biofilm of Beggiatoa-like filaments. One of the defining features of the genus Beggiatoa is the production of intracellular inclusions of sulfur resulting from the oxidation of reduced sulfur sources (e.g. hydrogen sulfide). In autotrophic Beggiatoa, sulfide is a source of energy and electrons for carbon fixation and growth.
Predacons - A group of Decepticons who have animal forms. They are often shown combining into Predaking. The Predacon name was used for the main villains in Beast Wars: Transformers and Transformers: Robots in Disguise. Terrorcons - A group of Decepticons with monster forms. They are often shown combining into Abominus. Later versions are used ...