Which character is true for bony fishes?
Chondrichthyes include Cartilaginous fishes and they are marine in nature. Their endoskeleton is made up of cartilage and notochord is persistent throughout life….Difference Between Bony Fish and Cartilaginous Fish.
|Bony Fish||Cartilaginous Fish|
|Endoskeleton is made up of bone.||Endoskeleton is made up of cartilage.|
|They have 4 pairs of gills.||They have 5-7 pairs of gills.|
What makes a bony fish a bony fish?
Bony fish differ from fish like sharks and rays in the chondrichthyes class. Instead of cartilage, bony fish have bones. They have paired pectoral and pelvic fins, and all but a few species have bones in their fins. They also have dorsal, anal, and caudal fins.
Did we evolve from fish or monkeys?
There’s a simple answer: Humans did not evolve from chimpanzees or any of the other great apes that live today. We instead share a common ancestor that lived roughly 10 million years ago.
Did humans ever have gills?
Artificial gills are unproven conceptualised devices to allow a human to be able to take in oxygen from surrounding water. This is speculative technology that has not been demonstrated in a documented fashion.
Does a human fetus have gills?
But human embryos never possess gills, either in embryonic or developed form, and the embryonic parts that suggest gills to the Darwinian imagination develop into something entirely different.
Where would a human have gills?
Just like fish, human embryos have gill arches (bony loops in the embryo’s neck). In fish, those arches become part of the gill apparatus. But in humans, our genes steer them in a different direction. Those gill arches become the bones of your lower jaw, middle ear, and voice box.
What does a pregnant woman’s poop look like?
Interestingly, the color of your stools can also change during pregnancy. Normal stools are usually light to dark brown, but during pregnancy, your poop could turn green.