Organism a shares 50% of its dna sequences with organism b, while organisms b and c share 90% of their dna sequences. what can be concluded from this?
a. organism a has suffered more mutations than organisms b or c.
b. organism a is more ancient than either organism b or organism c.
c. organisms b and c are more closely related to each other than they are to organism a.
d. organisms b and c are probably full siblings while organism a is a grandparent of both.

Need ! will give 20 points! what are two ways that diatoms differ from slime molds? the external coverings of diatoms are made up of (silica, chitin or peptidoglycan), while slime molds have cell walls containing (silica, peptidoglycan or chitin). diatoms are (chemoheterotrophs, photoautotrophs or chemoautotrophs) because they make food through photosynthesis, while slime molds are (heterotrophs, phototrophs or autotrophs) because they eat decaying plant matter.