Please help, giving away a lot of points A mountain climber is climbing up the side of a high rocky cliff. Explain how the following systems work together in order for the climber to climb up this mountain. Respiratory system, Circulatory system, skeletal system, Muscular System and digestive system.

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. the following chemical equation shows the combustion of ethane. balance the equation by filling in the coefficients. c2h6 + o2 → co2 + h2o

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?