Suppose that a scientist is studying a bacteriophage that infects and induces lysis of e. coli. he generated several mutant bacteriophage that are unable to lyse e. coli. to better understand the mechanism of action of the mutant phage, he coinfects e. coli with pairs of mutant bacteriophage to assay for bacterial lysis. if mutants 1 and 2 are both in one cistron and mutants 3 and 4 are both in a different cistron, determine the outcome for each experimental coinfection. outcome mutant mutant 2 23 lysis answer bank no lysis no lysis undetermined lysis lysis lysis

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

Sea levels are rising due to climate change while increasing numbers of people are moving into coastal areas. to accommodate more people, there has been increased construction of beachfront resorts and condominiums. how is this impacting sea turtle numbers and biodiversity and why? a. the increased human population in coastal areas has meant that more food is available to the turtles (e.g., dropped food, waste from restaurants), which has led to an increase in the numbers and diversity of sea turtles. b. there has been very little change in the numbers and biodiversity of sea turtles because the planet is so vast that they can simply relocate to less crowded beaches. c. this has resulted in a decrease in numbers and diversity of sea turtles because it is restricting available nesting sites, and hence reproduction. d. this has resulted in an increase in numbers and diversity of sea turtles because people are around to protect them from natural predators.

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?