Which experimental approach would be most effective and easiest to clearly determine the evolutionary relationship between these two organisms?
a. sequence the same gene in both species to compare their similarity.
b. dissect specimens of both species to look for homologous structures.
c. search fossil databases to locate a common ancestor.
d. evaluate cells from both species to determine whether they contain enzymes.
I have two pictures; one of an orange starfish and another of a medium-sized green snake. I am having trouble deciding on this, but I think it is either A or B.
To determine the evolutionary relationship between two organisms, you need to consider their genetic similarities, anatomical features, and shared ancestry. In this case, you have an orange starfish and a medium-sized green snake. Let's analyze the options given and see which experimental approach would be most effective and easiest to determine their evolutionary relationship:
a. Sequence the same gene in both species to compare their similarity:
This option involves comparing the DNA sequences of a particular gene in both organisms. By analyzing the similarities and differences in their genetic code, you can gain insights into their evolutionary relationship. This approach is known as molecular phylogenetics and is often utilized to determine evolutionary connections. However, this approach requires specialized laboratory equipment, expertise, and DNA sequencing techniques. It may not be the easiest option available, especially if you don't have access to the necessary resources to carry out this experiment.
b. Dissect specimens of both species to look for homologous structures:
This option involves comparing the anatomical structures of both organisms to identify similarities that suggest a shared evolutionary history. The presence of homologous structures, such as similar bone structures or organs, can provide evidence of a common ancestor. Dissection is a relatively straightforward technique, and comparing physical structures can sometimes provide valuable information about the organisms' relatedness. It is a more accessible approach and could potentially be easier to perform compared to DNA sequencing.
Considering your two options, dissecting specimens (Option b) would likely be the most effective and easiest approach to clearly determine the evolutionary relationship between the orange starfish and the green snake. By evaluating their anatomical structures, you may be able to identify any shared features indicating a common ancestor. However, it's important to note that this approach alone may not provide a comprehensive understanding of their evolutionary relationship, and the genetic analysis (Option a) could still be beneficial for a more accurate assessment.