Answer:
Option D, The DDT killed susceptible flies. The few that were already naturally resistant survived and passed this resistance on to their offspring.
Explanation:
When DDT was sprayed for the first time, some of the house flies which were not capable enough to withstand the adverse effects of DDT , eventually died. And the butterflies that survived through this, were having a natural resistance against DDT. Now, with time these DDT resistant houseflies mated and produced offspring that had genetic trait of resisting DDT by birth. This is the reason, why houseflies after ten years were as abundant as ten years back when the control program was started.
Option D is correct
The answer would be:
Energy
If you'd like to know more about the answer read on:
Amplitude refers to the displacement of a particle from the rest point of a wave. A wave that has high energy, has a high amplitude while one with low energy, has a low amplitude.
You can refer to the image attached to see where the amplitude is on a wave.
Answer:
Field of Genetics.
First Option should be legit!
Answer:
All the offspring of a cross between a tall pea plant and a dwarf pea plant are tall. This means that the allele for tall plants is <u>DOMINANT OVER</u> the allele for dwarf plants.
Explanation:
Mendel's law of dominance state that the heterozygous genotype expresses only one allele of a gene out of the two alleles present together. The allele that is expressed in a heterozygous genotype is said to be the dominant one as it does not allow the expression of another allele of the gene.
The allele of a gene that is not expressed in the presence of its dominant allele is said to be the recessive one. Under such conditions, a heterozygous genotype expresses the dominant phenotype. When a tall and dwarf pea plants are crossed, all the F1 progeny is tall. This means that the allele for the tallness is dominant over the allele for the dwarfism.
