Yellowstone Lake, occupied by S. yellowstonensis, sits in a volcanic caldera, and is heavily influenced by superheated water carrying extraordinarily high levels of dissolved nutrients that diatoms need to grow, levels much higher than typical in other lakes occupied by S. niagarae. The soils of its basin though are composed mostly of obsidian sand (glass!!) which will cause very low levels of other nutrients. Altogether it is a very different lake than those typically having S. niagarae. Why is this important?

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials