a. The two species with homologous traits that I chose to compare are the whale and manatee.
b. Both the whale and manatee have fins for swimming and are adapted for marine life. In addition, whales and manatees give birth to calves.
c. Both whales and manatees have a shared ancestry with land mammals. Their genetic relationship can be explained by the bone structure in their flippers. Each possesses bone structure that is similar to those shared by terrestrial animals (very similar to a human hand!) The manatees’ most closest relative may be the elephant and the whale’s, a human.
bones in a whale flipper
bones in a manatee flipper
d. image of each species
a. The two species with analogous traits that I selected for comparison are the shark and the whale.
Both are marine animals that live in the ocean.
b. The analogous trait shared by both the shark and the whale are their fins for swimming. Each have a top fin, two side fins and a tail fin which help them glide for the water. Their skin also has adapted them for marine life.
c. I believe the common ancestor shared by both the shark and the whale is the reptile. Reptiles do not have fins and have adapted to life on land.
d. Images of the two analogous species
Very good on your homologous trait.
ReplyDeleteYour discussion of the analogous trait is excellent but you need to rethink the common ancestor. A shark is a type of fish and one of most ancient of creatures. They have a very successful body phenotype. You don't change what works. Fish are the precursors of amphibians who then gave arise to the reptiles and then onto mammals. So the common ancestor of the shark and the whale would be another fish-type creature.