Across 5: predation
across 6 hominid
down 3 : Distribution
down 9 : glaciations
The structure of DNA is called a double helix because DNA is made up of two strands of nucleotides wound together in a spiral.
DNA has two strands that run opposite of each other and twist together much like a twisted ladder. Each backbone of the ladder is made up of alternating groups of sugar and phosphate groups.
Plants grow quickly/ plants grow using photosynthesis.<span>
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True....................................................................
