Dna strands are antiparallel, having both 3' and 5' ends. which of the following answer choices best models the antiparallel structure of two complementary strands of dna?
a.5' agctc 3'5' tcgag 3'
b.3' agctc 3'3' tcgag 3'
c.3' agctc 5'5' tcgag 3'
d.3' agctc 3'5' tcgag 5'

Apea plant that is heterozygous for the tall phenotype can produce short offspring when self pollinating. which of the following explains why this occurs? a. segregation of allels b. condominance of traits c. polygenic expression of traits d. independent assortment of alleles

In sexual reproducing animals once fertilization of the egg takes place, the exists as a single cell until cell division begins. a) egg b) larva c) sperm d) zygote

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.