The lactose (lac) operon in E. coli is an example of a repressed gene when lactose is not available in a cell . In 3-5 sentences, explain what this means using correct terminology please make the answer short

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Coat color in cats is determined by genes at several different loci. at one locus on the x chromosome, one allele (x ) encodes black fur and another allele (xo) encodes orange fur. females can be black (x x ), orange (xoxo), or a mixture of orange and black called tortoiseshell (x xo). males are either black (x y) or orange (xoy). bill has a female tortoiseshell cat named patches. one night, patches escapes from bill\'s house, spends the night out, and mates with a stray male. patches later gives birth to the following kittens: one orange male, one black male, two tortoiseshell females, and one orange female. what are the genotypes of patches, the stray male, and the kittens?

Types of scientific inquiry that biologist engage in that cannot be completely controlled