a. Briefly describe the two different species that possess the homologus trait.
A: The two species that represent a homologous traits are snakes and humans. We both posses pelvic bones.
b. Describe the homologus trait of each species, focusing on the differences in structure and function of the trait. Why do these homologus traits exhibit differences between the two species? Make sure your explanation is clear and complete.
A: The homologous trait of the human is the pelvic bone, snakes also have a pelvic bone. In a human our pelvic bone is attached to our legs, which in turn helps us get around. In a snake their pelvic bone serves absolutely no purpose, it sticks to nothing. The only reason they have one is through some distant relative that did possess legs.
c. Who was (generally, not specifically) the common ancestor of these two species and how do you know that ancestor possessed this homologus trait?
A: The common ancestor between a snake and a human is an amniote, which is a vertebrate.From this ancestor produced the vertebrates reptiles, birds, and mammals.
d. Provide an image of each species in this comparison.
2. For your analogous traits provide the following information.
a. Briefly describe the two different species that possess the analogous trait.
A: The snake and humans also have analogous traits. It is also their pelvic bones.
b. Describe the analogous trait of each species, focusing on the similarities in structure and function of Analogy/Homologypts)
A: The Analogous trait is that a human is a mammal and a snake is a reptile. Yet they both have pelvic bones. the snake has just evolved not to use his anymore with the absence of legs, but still has the bone.
c. All pairs of organisms share some common ancestor if you go back far enough in time. Did the common ancestor of these two species possess this analogous trait? Why or why not?
A: Yes the common ancestor did posses the analogous trait. It too had a pelvic bone. It probably walked around and when it evolved it created reptiles and snakes being a reptile evolved not to have legs.
d. Provide an image of each species in this comparison.
16 comments:
Your homologous trait was excellent. I'm confused why you used the same comparison as your analogous trait as they can't be both homologous and analogous. If their common ancestor had the trait and both organisms inherited the trait from that ancestral line, the trait must be homologous.
I think I was confused,I misunderstood the example of the birds and the bat. I had read it many times, and I was tired and just ended up cofusing myself. I just reread it makes sense to me now.
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