According to Darwin, in species could result from many over long periods of time. A. population growth; births
B. big changes; small changes
C. mating; interactions
D. xtinction; deaths

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

(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.

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%