Which is not a challenge land plants had to overcome in order to live on land?
a. transporting water
b. absorb minerals
c. conserve water
d. reproduce on land

When one dna molecule is copied to make two dna molecules, the new dna contains a) 25% of the parent dna. b) 50% of the parent dna. c) 75% of the parent dna. d) 100% of the parent dna. e) none of the parent dna.