Reference no: EM1385602

1) when an organism incorporates genetic material from another orgainism that is not its parent, this is know as

a) vertical gene transfer

b) diagonal gene transfer

c) horizontal gene transfer

d) none of the above

 

2)modern day mammals are descended most recently from what group

a) synapsids

b) diapsids

c) fish

d) amphibians

 

3) the earliest fossils of our own species date to

a) approximately 500,000 years ago

b) approxiamatly 2 million years ago

c) approxiamtely 6 million years ago

d) approximately 2000,000 years ago

 

4) which of the following is not a homology?

a) the production of milk in humans and cats

b) the laying of eggs with shells in snakes and lizards

c) the ability to enter a dormant stage in bears (hibernation) and Gram-positive bacterai (endospore formation)

d) Feathers in birds such as ostriches and penguins

 

5) in terms of monomers, DNA is made of

a) peptides

b) amino acids

c)monosaccharides

d) methyl groups

e) nucleotides

 

6) A mature RNA transcript differs from a primary RNA transcript because

A) introns are added to the mature transcript

b) exons are spliced out of the mature transcript

c) Exons are added to the mature transcript

D) introns are spliced out of the mature transcript

 

7) why are bird fearhers considered an exaptation?

a) because they first evolved under different conditions thna thos under which they are currently found

b) because they are evolutionary reversal to an ancestral character state

c) because they are traits that have independently evolved in separate lineages

d) because they are a shared derived character found in most birds

 

8) why is a notochord an important adaptation for understanding the evolution of humans?

a) A notochord serves to distinguish the ediacaran fauna from the trilobites

b) the development of a notochord ovcurred in early fish

c) A notochord is a backbone

d) A notochord is characteristic of chordates