Yes it is hope i could help and is that supposed to be a ques tion
Answer:
A dichotomous key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Keys consist of a series of choices that lead the user to the correct name of a given item. "Dichotomous" means "divided into two parts"
Explanation:
Hiya!
You can use the example of dogs and humans, Dogs give protection and companionship while humans give a home and food to the dog!
This is called Mutualism by the way! :D
Good-Luck!!
It seems that you have missed the necessary options for us to answer this question, so I had to look for it. Anyway, here is the answer. Testosterone and estradiol are male and female sex hormones, respectively, in many vertebrates and the way that these two molecules differ from each other is that, t<span>estosterone and estradiol have different functional groups attached to the same carbon skeleton. Hope this helps.</span>
How large extinct animals were, at the time.
