The answer is Archaeopteryx.
Archaeopteryx is a bird-like dinosaur. It lived in an archipelago of islands that later formed Europe 150 millions of years ago. It was a raven-size. It had a feather and wing and was able to fly. Despite that, it was more similar to the dinosaurs than the modern birds, with its sharp teeth, claws, and skeleton. Nevertheless, it<span> represents transitional fossil between reptilia and birds.</span>
If you are going from a high gradient to a low gradient it’s passive transport. Think of a hill if you put a rock at the top of that hill it will go down no energy involved. Active transport is going up the hill you must use energy to push that rock up the hill because it’s from a low gradient to the top. Hope this helps
Answer:
It suggests that only some organisms need energy to live.
It proved that amino acids are created when inorganic molecules are exposed to electricity....
Answer: Chondroitin and collagen fibers
Explanation:
Cartilage is made of the specialized cells which is known as chndrocytes. These chondrocytes produce large amount of extracellular matrix which is composed of collagen fibers, elastin fibers and proteoglycan.
There are no blood vessels in the cartilage to supply nutrients to the chrondrocytes.
The cartilage is flexible and provides strength to the long bones. It is rubber like padding that covers the end of the bones.
It is found in rib cage, nose, ear, bronchial tubes et cetera.
