What do scientists consider when they perform a cladistic analysis?

a. only the DNA of organisms
b. all traits of organisms
c. derived characters
d. only physical similarities


Ans: c. derived characters

Biology & Microbiology

You might also like to view...

Biogeochemical cycles are crucial to ecosystem function because __________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

You're a doctor visiting with a patient, and you remind her to get her flu vaccination this year. She looks at you quizzically and says, "I don't need a vaccination. I got one last year." Which of the following would be the most appropriate biological explanation?

A. " Flu vaccinations wear off after a year, so you should really get another one." B. "The flu virus evolves very rapidly, so last year's vaccination will not be as effective as this year's vaccination." C. "Well, you should be okay then." D. "Well, it is free."

Biology & Microbiology

Integrins are

a. transmembrane proteins. b. peripheral membrane proteins. c. components of the extracellular matrix. d. components of a desmosome.

Biology & Microbiology

Birds that catch their prey by plunge diving into the water from the air are:

a. skimmers. b. cormorants. c. terns. d. penguins. e. avocets.

Biology & Microbiology