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The three-point hitch (British English: three-point linkage) is a widely used type of hitch for attaching ploughs and other implements to an agricultural or industrial tractor. [ 1 ] [ 2 ] The three points resemble either a triangle, or the letter A.
Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from Ancient Greek ἀκτίς (aktis) 'having rays' and πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [2] that comprise over 50% of living vertebrate species. [3]
The hitch was first formally described in 1854 by Spencer Fullerton Baird and Charles Frédéric Girard with its type locality given as the Sacramento River in California. [6] While the hitch is closely related to the California roach ( Hesperoleucus symmetricus ), and the two species can hybridize, leading some authorities to place H ...
[2] [3] [4] They are the second earliest diverging group of living ray-finned fish after the bichirs. Despite being early diverging, they are highly derived , having only weakly ossified skeletons that are mostly made of cartilage , and in modern representatives highly modified skulls.
Row crop cultivators are usually raised and lowered by a three-point hitch and the depth is controlled by gauge wheels. Sometimes referred to as sweep cultivators , these commonly have two center blades that cut weeds from the roots near the base of the crop and turn over soil, while two rear sweeps further outward than the center blades deal ...
The average weight of a sheepshead is 1.4 to 1.8 kg (3 to 4 lb), but some individuals reach the range of 4.5 to 6.8 kg (10 to 15 lb). [11] This species was subjected to overfishing in the past, and is again becoming more important to commercial fisheries in the Gulf of Mexico as more desirable species, like red drum ( Sciaenops ocellatus ...
Leopards are great climbers and can carry their kills up trees to keep them out of reach from scavengers and other predators. Arboreal locomotion is the locomotion of animals in trees. In habitats in which trees are present, animals have evolved to move in them. Some animals may scale trees only occasionally (scansorial), but others are ...
To make things worse Actinopterygii is labelled as a class in it's own page, but as an order in Osteichthyes? Maybe the Osteichthyes page should be clarified a bit and the Chordata page altered also to show more clearly that the lobe and ray finned fish are classes of the Osteichthyes.