What is likely the effect of a mutation that changes a single base in a gene compared to a mutation that inserts a single additional base

The image shows embryos of three vertebrate classes

What two fields of study provide the core information that is used to classify organisms?

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.