Select the correct statement about phylogenetic trees. a. all phylogenetic trees are similarly shaped. b. phylogenetic trees may expand quickly to maximum width and then narrow over time. c. phylogenetic trees always show increased branching, representing increased diversity over time

Alaska and northern canada have a diet rich in vitamin d and their skin color is darker than predicted on the basis of iv intensity at their latitude. explain the observation:

What is the correct trna sequence that would match the following mrna sequence.gcgaua

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.