Ans. (B). Genes.
The chemicals that kill the weeds are known as herbicides. Herbicide-resistance is defined as the inherited ability of weeds to survive an application of herbicide, that can kill a normal weed plant of same species.
The resistance develops due to mutations in genes that were sensitive to those chemicals in wild-type forms. As genes are responsible for transfer of characteristics from one to another generation, the herbicide-resistance is also passed down to generations through genes.
Thus, the correct answer is option (B).
Answer:
Central vacuole...storage is the correct answer
Explanation:
The birth and reproduction of Carrier(Heterozygous) organisms, (i.e) heterozygous individuals that have a dominant allele masking the effects of the recessive 'lethal gene.' However even though the gene is masked, it is still there. Therefore, if the heterozygous individual is to reproduce with another heterozygous (carrier) organism there is a higher chance that their offspring will have the active form of the 'lethal gene' causing the death of the offspring.
Answer:
This is a case of natural selection
Explanation:
Mutations are a fundamental part of the process of evolution by natural selection. These are a random genetic modifications that occur on every organism - some are beneficial and others could be harmful or disadvantageous. Therefore, natural selection decides which mutations will stay on a population and which ones will be eliminated.
In this scenario, this mutation enables the male bird to carry out better mating rituals, therefore it would be considered beneficial as it helps the species to reproduce and survive. So, it will be passed on from generation to generation, making other individuals fit for survival.
An oil spill from a tanker is an example of point-source pollution.
