La velocidad del sonido depende del medio en que esté propagándose la onda sonora. Por ejemplo, una onda que se propaga en un sólido tiene mayor velocidad que en un líquido, y una que se propaga en un líquido tiene mayor velocidad que en un gas. La velocidad del sonido es mayor en sólidos, porque en los sólidos las partículas se encuentran más
A. separadas que en los gases.
B. separadas que en los líquidos.
C. cercanas que en los líquidos y en los gases.
D. cercanas que en los gases y más separadas que en los líquidos.

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals

Injuries in the environment are a result of

You will create a molecular clock model for an arthropod gene. follow these guidelines to make your model: . your timeline will span from 90 million years ago to the present. the common ancestor in your model is an arthropod that lived 90 million years ago. the gene that you'll track codes for a protein in the species venom . the dna sequence youll track contains 10 nitrogen bases. you can choose the order of the bases and where the mutations occur. this gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. to build your model,/ calculate the estimated time period it takes for 1 base pair to mutate. the first time period will only show the common ancestor. at the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences. the first and third descendant species will survive for the rest of the timeline. the second descendant species was extinct 50 million years ago. calculate how long it will take for one full base pair mutation to occur. explain your reasoning by constructing a mathematical equation