Biology, 30.07.2019 05:00 Naysa150724
In the late 1940's, scientists released a group of chemicals, pyrethroids, to kill insects in auricular crops. by the year 2000, over 100 insect species were resistant to pyrethroids and scientists had to develop a new plan to kill them. explain what happened genetically in the insect population over time as the insects were exposed to pyrethroids. a) the toxicity of pyrethroids weakened over time. b) the allele for pyrethroid resistance increased throughout the population. eliminate c) pyrethroid resistance became the dominant allele in the insect populations. d) most insects had the allele for pyrethroid resistance, but it remained masked.
Answers: 1
Biology, 22.06.2019 00:10, maxy7347go
Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?
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Biology, 22.06.2019 01:30, terry94
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?
Answers: 3
Biology, 22.06.2019 02:50, cocodemain
Cells destroy body cells infected by a virus or bacteria.
Answers: 1
In the late 1940's, scientists released a group of chemicals, pyrethroids, to kill insects in auric...
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