The following concepts led to the hypothesis that dna has a double helix structure:

i. the ratio of a: t is 1: 1.
ii. deoxyribose is the sugar in dna.
iii. dna strands are antiparallel

ii and iii

i ii and iii

ii

i and ii

i and iii

Acommon kind of mechanical weathering is called

2. how does the miller-urey experiment fall short of demonstrating that life can arise from inorganic molecules? explain. a. it doesn't show a leap between a collection of amino acids and a single-celled organism. b. it recreates the conditions that existed at the earth's beginning, but no molecules form as a result. c. it doesn't provide evidence of the formation of amino acids. d. it doesn't show how multicellular organisms developed from unicellular organisms

In this assignment, you will analyze an example of speciation by researching the finches of the galapagos islands. then you will answer questions to construct explanations and draw conclusions based on the information you gather. someone plz !