The length of a year on earth is a little over 365 days. the length of a year on a planet is best described as the time it takes for which to occur? a. the seasons to complete a full cycle
b. the planet to rotate once on its axis
c. the sun to rotate once on its axis
d. the planet to revolve once around the sun

D. the planet to revolve once around the sun

Explanation:

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

answer: b

coz red blood cells marrow and circulates the body for 120 days.