1A)The two species that I choose is humans and gorilla, Humans are also known as homosapien they're the only surviving species of the genus homo.Humans are primates and they origin from African and mulitiregional origin.Gorilla are also known as hominoid there origin is Africa and southeast Asia.
1b)The homologous trait for gorilla and human is gorilla has a opposable big toe where humans have a non opposable big toe/Parallel to other toes.Us as humans our big toe we don't need it but it is ver crucial we have it because our big toe helps us stand and keep balance.For gorilla opposable they use there big toe to grab things and to help climb.To apes there big toe is crucial because its almost another set of hands.Gorillas environment which is in the eastern lowland in the tropical forests requires them to survive and adapt to the forest.Whereas humans evolved and opposable toe isn't as necessary as gorilla.
1C)The last common ancestor of the Gorilla and human goes back to about 10 million years agoThe first full sequence of the gorilla genome which was taken from a female western lowland gorilla by the name of Kamilah .The gorillas we have now are the last of the living great apes.Human and gorillas have its complete genetic sequence catalogued. The similarities in genes involved things from hearing to brain development.
1D)
2A)The two species that I choose that have the same analogous trait is birds and bats.Birds are a group of endothermic vertebrates. Whats unique about birds are they have feathers , four chambered heart, beaked jaws,and they're also known for having a strong skeleton.Birds are considered reptilian, there is about 9,965 of different type of birds.Bats are mammas whats unique about about bats is there forelimbs from webbed wings,bats can see in the dark , and they can fly at a speed of 60 mph.Bats are the second largest order of mammals, and they're over 1,100 of bat species.
2B)Both bats and birds have wings ,structurally similar with this skin that stretch out when extending their arms and is fully functional as wings to fly.Both bird and bat share the same diet coasting of fruits and nectar and are often around the same size.They both tend to avoid human contact,and they have streamlined bodies .Evolutionary selection pressures caused the mammal to evolve into wings to survive in their environment , birds need wings to migrate.
2C)It is possible that bats came from a bird descendant from ancient eras even though birds and bat wings are analogous. Birds and bats did not inherit wings from a common ancestor.
2D)
Good on your opening description of your homologous species.
ReplyDeleteGood choice of homologous trait! Sometimes focusing on very specific, relatively small structures makes the homologous relationship very clear. Well done.
I appreciate the information on ancestry, but keep in mind that the point here was to support your claim of homology. We can be specific regarding the common ancestor, or we can recognize that since both gorillas and humans are apes, then the common ancestor was also an ape, and we know from fossil evidence that archaic apes possessed the basic opposable toe structure inherited by both lines of descent, though altered by hominids as they developed bipedalism. It is that evidence of common descent that we need to confirm that these traits are homologous.
Good opening description of your analogous species.
Good description of the analogous trait and good explanation as to why these structures evolved through similar environmental pressures.
"It is possible that bats came from a bird descendant from ancient eras even though birds and bat wings are analogous."
You can either have one or the other, but not both. They are either genetically related shared traits or they are analogs.
Birds and bats (mammals) arose from a common reptilian ancestor who did NOT possess the winged structure. We know from fossil evidence that bats evolved wings independently from their archaic mammalian ancestor and birds evolved wings as they split off of their archaic reptilian ancestor. That means both evolved their wings independently from each other AND from that common reptilian ancestor. That is what we need to know to confirm that these traits are analogous.
Good images.
Hi Brenda!
ReplyDeleteI enjoyed reading your post on the homologous trait on opposable big toes between humans and gorillas. I never knew they had an opposable big toe to begin with! It is interesting that the gorillas have ancestors dating back 10 million years ago with a female named Kamilah and that the modern apes are the last of the Great Apes. Thank you for our post i enjoyed it!