genes - Answerprovides directions for cell to assemble molecules that express traits double helix - AnswerShape of DNA nitrogen base, sugar, and phosphate group - Answerthree genetic units that makeup nucleotides DNA - Answerdeoxyribonucleic acid replication - AnswerCopying process by which a cell duplicates its DNA RNA - Answerribonucleic acid two identical strands of DNA - AnswerWhat replication process produces reason 1: DNA double-stranded, RNA single-stranded - AnswerReason 1 how DNA is different than RNA reason 2: RNA has uracil instead of thymine - AnswerReason 2 how DNA is different than RNA reason 3: RNA has ribose instead of deoxyribose - AnswerReason 3 how DNA is different than RNA type 1 - messenger (mRNA) - Answertype 1 RNA type 2 - transfer (tRNA) - Answertype 2 RNA type 3 - ribosomal (rRNA) - Answertype 3 RNA Mutation - Answera change in the nucleotide sequence of a gene type 1 - substitution - Answertype 1 mutation type 2 - insertion - Answertype 2 mutation type 3 - deletion - Answertype 3 mutation proteins and DNA - AnswerWhat are chromosomes made of? Adenine - AnswerThe base that pairs with Thymine in DNA Cytosine - AnswerThe base that pairs with Guanine with DNA TACCG - Answercomplementary strand to ATGGC alternating sugar and phosphates - Answerthe molecules that form the sides of the DNA ladder pairs of nitrogen bases - Answerthe rungs that form the DNA ladder so each cell can contain identical genes - AnswerWhy must DNA to able to copy? x-ray diffraction - Answerprocess used by Rosalind Franklin to make images of DNA that helped reveal the structure of DNA every time a cell divides - AnswerHow often is DNA copied? 6.7 billion - Answerapproximately how many people live on Earth limited resources - AnswerWhy do carrying capacities exist for all species on Earth? improved health care and clean water - Answercaused the greatest increase in growth of the human population 1900-2000 - Answertime span that human population increased the most deforestation - Answerremoval of large areas of forests for human purposes Destroys habitats and leads to species extinction - Answernegative effects of deforestation