1* 1.
a.
Which of these best explains why birds and dogs both show gills in their early
development?
Both organisms can breath underwater
Both organisms share a common ancestor
Both organisms use them to process food when they are young
Both organisms have different ways of forming their lungs
b.
C.
d.
a
b
с
d

D).Both organisms have different ways of forming their lungs

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.

it should be d) transitional fossils.

they show the gradualism of evolution throughout a period of time