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:
a. Hormones can persist much longer than electrical signals
Explanation:
Althought hormonal response is slower than electrical signals it affects a large number of organs and sistems. Example: electrical signals are for the openening or closing channels of sodium/potassium wich causes ionic differences on the cells producing quick reponses like movement or blood pressure changes. Meanwhile hormonal response control larger sistems and more complex process like pregnancy
Answer:
Science and technology improve the our lives. This is thanks to the many discoveries science have gifted us. When it comes to science, scientists have discovered all type of drugs that helped us raise our life expectancy. Technology advances at the same time science does, as we discover new natural resources to use we make simple task faster and easier with technology, also makemas our health care system more acurate and efective
Double fertilization is observed in flowering plants during which there is fusion of the sperm cells and the egg cell and two polar nuclei. This forms a diploid zygote and a triploid endosperm.
ANSWER: All of these choices are correct.
