Search results
Results from the WOW.Com Content Network
Elasmobranchii is one of the two subclasses of cartilaginous fish in the class Chondrichthyes, the other being Holocephali . Members of the elasmobranchii subclass have no swim bladders, five to seven pairs of gill clefts opening individually to the exterior, rigid dorsal fins, and small placoid scales. The teeth are in several series; the ...
Batomorphi is a clade of cartilaginous fishes, commonly known as rays, this taxon is also known as the superorder Batoidea, but the 5th edition of Fishes of the World classifies it as the division Batomorphi. [2]
Reproduction occurs in the winter in offshore waters, while pups are normally born in the warmer and deeper offshore waters where it is harder for humans and predators to reach them. The reproductive cycle begins when females produce several large eggs of yellow coloring, which become fertilized once they pass through the shell gland and are ...
Total payroll employment is at a record 159.3 million jobs, up 7 million from the prepandemic high. The unemployment rate — that is, the number of workers who identify as unemployed as a ...
Fertilization and embryonic development occur internally; this ovoviviparous or live-bearing mode of reproduction results in a small litter (usually two to four) of large well-developed pups, up to 150 cm (59 in) at birth in thintail threshers.
Police in Willingboro Township found Kim Beacham-Hanson, 57, dead from multiple blunt injuries allegedly delivered by her daughter, 32-year-old Breanna Beacham.
BMW and Yamaha Motor have invested in U.S.-based rare earths processing startup Phoenix Tailings, the latest move by manufacturers to boost production of the strategic metals outside of China.
The pair then parts, the female being left with scars on her fin. [33] [12]: 46 The fertilized eggs develop within the female's oviduct. At first, they are enclosed in an egg case while the developing embryos absorb the yolk. After hatching, the pups remain in the oviduct and receive additional nutrition from milky secretions called histotroph ...