Within a species, a number of characteristics remain the same from one generation to the next. This is because .
A.
many species' characteristics are physical
B.
many species' characteristics are genetic
C.
many species' characteristics are environmental
D.
many species' characteristics occur by chance

h

explanation:

the answer will be a) proteins i believe

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

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.