Members of two different species possess a similar-looking structure that they use in a similar fashion to perform the same function.
Which information would shed the most light on whether these structures are homologous or whether they are, instead, the result of convergent evolution?

a. The two species share many proteins in common, and the nucleotide sequences that code for these proteins are almost identical.
b. Both species are well adapted to their particular environments.
c. The sizes of the structures in adult members of both species are similar in size.
d. Both species reproduce sexually.
e. The two species live at great distance from each other.

a. The two species share many proteins in common, and the nucleotide sequences that code for these proteins are almost identical.

Explanation:

Homologous structures are structures that living organisms possess due to the fact that they shared a common ancestry. These structures could be in the form of organs or a skeletal part of the body.

Homologous structures for living organisms with a commonly shared ancestry do not have to look the same or perform the same functions.

Examples of Homologous structures are : The arm in humans, wings in bats and the flipper in whales. Humans, Bats, Whales share a common ancestry because they are mammals and they share many proteins in commone.

Also, the nucleotides that code for proteins found in the wings of bats, arms of humans and flippers in whales are almost identical.

"d.) carbon dioxide and hydrogen sulfide"

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.