What skeletal adaptations allowed fishes to evolve into four legged walkers and land dwellers?
What will be an ideal response?
Bones of a lobe-finned fish's pectoral fins and pelvic fins are homologous with those of an amphibian's front and hind limbs. During the transition to land, these bones became larger and better able to bear weight. Ribs enlarged and a distinct neck emerged, allowing the head to move independently of the rest of the body.
You might also like to view...
The diagram shows the monomers, glucose and fructose, before occurs, which builds a polymer via the removal of water.
A. reproduction B. dehydration synthesis C. oxidation D. evaporation E. hydrolysis
If a double-stranded DNA has 20% adenine, then it will have ________ % cytosine
Fill in the blank(s) with correct word
"Glycogenolysis" refers to the state where
A. glucose levels are increased in the blood through the breakdown of glycogen. B. glucose levels are increased in the blood through the synthesis of glycogen. C. glucose levels are decreased in the blood through the breakdown of glycogen. D. glucose levels are decreased in the blood through the synthesis of glycogen. E. glucose levels are increased in the blood as a result of lipolysis.
Prions are created when normal proteins in the body ____
a. combine with large ribosomal subunit and become infectious b. exchange several long sections of amino acids with other infected proteins c. refold into a different and infectious three-dimensional shape that kills cells in the brain and nervous system d. undergo mutation and create hundreds of copies of themselves e. invade the immune system, causing it to mistakenly destroy the body's healthy tissue