Answer:
Parental cross: Bb x Bb
F1:
- Expected phenotypic ratio: 3/4 black fur (B_); 1/4 white fur (bb) >> 3:1
- Expected genotypic ratio: 1/4 BB; 1/2 Bb; 1/4 bb >> 1:2:1
Explanation:
A gene variant or 'allele' is dominant when it completely masks the presence of the other allele called recessive in individuals that are heterozygous for that gene. In this case, the allele 'B' associated with the black fur phenotype exhibits complete dominance on the allele 'b' associated with the white fur phenotype. In consequence, the mating between two heterozygous (Bb) parents will produce an F1 generation with an expected phenotypic ratio for the fur trait of 3:1, i.e., 3 black fur individuals (B_ genotype) and 1 white fur individual (bb genotype), and an expected genotypic ratio of 1:2:1 among BB, Bb and bb genotypes.
Sun to producers to herbivores to carnivores to decomposes etc.
The right answer is Drug tolerance.
The tolerance of a drug can be considered as the ability of the body to support a certain dose of a drug.
Drug tolerance, on the other hand, refers to the decrease of the reaction at repeated constant doses of a drug or the need to increase the doses to maintain a constant effect. Tolerance to the drug may result in physical (physiological) or emotional dependence, which is a state of adjustment associated with withdrawal syndrome upon discontinuation of repeated drug exposure.
Answer: It is (D) Skin
Explanation: Skin can absorb materials, it also protects our body, it also regulates our body temp.
'Natural selection' can be defined as the process of selection of the organisms who are more evolved and better suited for their surroundings and are capable of producing high number of offsprings. Artificial selection can be defined as the selection of the organisms by the humans to selectively breed whether or not they are suited for the changing surroundings or not. Since, the farmer only introduced the pesticide, and the insects evolved and inherited resistance to the pesticide, this is a case of the natural selection.