Which two of these characteristics are examples of endoskeletons?
scales in fish
bones in mammals
calcium-rich plates in echinoderms
appendages in arthropods

Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat