Which of the following situations will lead to natural selection?
the seeds of two plants land near each other and one grows larger than the other.
two types of fish eat the same kind of food, and one is better able to gather food than the other.
male lions compete for the right to mate with females, with only one possible winner.
all of the above

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide