Why does the mid-day winter sun not produce as much intense heat as the mid-day summer sun?
a. the earth is further from the sun
b. the sun is closer to the horizon
c. the sun’s light is spread and diluted more
d. the sun is not up as long
e. a and b only
f. b and c only

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations

Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.