1. A. The species that share the homologous trait is the platypus and the seagull or "gull".
B. The homologous trait is webbed feet. For the seagull the webbed feet serve as flippers when swimming giving them a versatile sea-air prowess. The platypus has a very unique set of webbed feet. The male platypus has ankle spurs that produce a cocktail venom, the front webbed feet of the platypus are more significant than the back which are folded up when waling on land. Their webbed feet have claws at the tip that are used to dig its burrow.
C. the common ancestor of the two species would be tetrapods. Tetrapod is derived from a Greek word that means "four-footed" comprises for four limped vertebrates and their descendants such as; amphibians, reptiles, birds, and mammals.
2. A. The species that share the analogous trait are the pelican and the seagull.
B. The analogous trait they share is their beaks. The beak of the pelican is used to scoop up their food/fish from the ocean, and the beak of the seagull is used to dig underground to find earthworms which is their main source of food.
C. The common ancestor of the two species is the Charadriiformes. It is the earliest common ancestor and are sea birds; birds that have adapted to diving over water and swimming. They often live near water. However this bird usually lived on the ground but were strong flyers and fed on animals in or near water. Using their beak to to crack snail shells and to puncture small animals.
B. The homologous trait is webbed feet. For the seagull the webbed feet serve as flippers when swimming giving them a versatile sea-air prowess. The platypus has a very unique set of webbed feet. The male platypus has ankle spurs that produce a cocktail venom, the front webbed feet of the platypus are more significant than the back which are folded up when waling on land. Their webbed feet have claws at the tip that are used to dig its burrow.
C. the common ancestor of the two species would be tetrapods. Tetrapod is derived from a Greek word that means "four-footed" comprises for four limped vertebrates and their descendants such as; amphibians, reptiles, birds, and mammals.
2. A. The species that share the analogous trait are the pelican and the seagull.
B. The analogous trait they share is their beaks. The beak of the pelican is used to scoop up their food/fish from the ocean, and the beak of the seagull is used to dig underground to find earthworms which is their main source of food.
C. The common ancestor of the two species is the Charadriiformes. It is the earliest common ancestor and are sea birds; birds that have adapted to diving over water and swimming. They often live near water. However this bird usually lived on the ground but were strong flyers and fed on animals in or near water. Using their beak to to crack snail shells and to puncture small animals.
You actually have your homologies and analogies reversed.
ReplyDeleteHomologies will have similarities due to common ancestry but differences due to environmental and functional variation, which describes the pelican and the seagull. They are both birds and inherited their genetic traits from a common beaked bird ancestor, but their traits vary due to functional differences in differing environments.
Analogies will share commonalities due to similar functions in similar environments, not due to genetic ancestry. This describes the feet of the platypus and the seagull.
Other than this complete reversal, the descriptions and discussions were good, just backward. Good images as well.
I was originally confused by our post but i realized that you had the he traits backwards. But it was cool to learn a little bit about the platypus. its interesting that to think that they share a common ancestor which makes you wonder what an ancient platypus would look like. Good post
ReplyDeleteI myself think that the webbed feet that the flatipus and the seagull share are extraordinary. Not because of the functions that they both serve, but because of the similar trait that two animals that are totally different share. One for instance is an elegant bird that glides through the skies, and the other of course is a huge animal that lives on land. It is amazing how evolution itself can help to species that are so distinct end up with similar trais, mainly due to the fact that because adaptation helps these changes occur in order to meet some kind of life requirement.
ReplyDelete