4. Why are "normal" sex roles and sexual dimorphism reversed in some species? Correct
Ans-Sea horses- males get pregnant, male choose for females
Sexual selection stronger on females
Males attracted to larger females with fewer spots
→ reversed sexual dimorphism
5. What is a species? Provide a general definition and two more specific definitions that
attempt to specify more precisely the meaning of the general definition. Correct Ans-
Species- smallest evolutionary independent unit
Biological Species Concept- species are groups of actually or potentially interbreeding natural
populations, which are reproductively isolated from other such groups
Phylogenetic Species Concept- whatever the smallest group that we can identify on a
phylogenetic tree is a species
6. What are some of the limitations and drawbacks of the biological species concept? Of the
phylogenetic species concept? Correct Ans-Drawbacks of Biological Species Concept-
Microbe are not sexually producing, extinct organisms, hybrids, Organisms that don't
naturally overlap
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GOLDTUTORS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.