Biology, 09.12.2021 02:40, whitakers87
the lactose operon in E. coli is an example of a gene that is expressed when lactose is not available in a cell, what does it mean
Answers: 3
Biology, 22.06.2019 00:50, bob4059
Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems
Answers: 3
Biology, 22.06.2019 01:30, ayoismeisalex
Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.
Answers: 1
Biology, 22.06.2019 02:50, arangoaiden71
Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays
Answers: 1
the lactose operon in E. coli is an example of a gene that is expressed when lactose is not availabl...
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