What is a cistron? 2) a. if 2 different mutant rii phages are able to lyse e. coli k (our lab manual's shorthand for k12(λ)) when they co-infect it, while neither mutant can lyse it separately, what can you say about the 2 mutations?

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey

If there are 350 trout found in 200 square feet of a pond measuring 1000 square feet what is the estimated trout population of the pond? a. 1350 b. 1550 c. 1750 d. 2000

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