4) biotechnology has produce crops that are resistant to certain pests, crops that produce high yields, and more nitrogen-efficient crops. what is a negative impact that bioengineered plants may have on the environment? a) beneficial insects may be adversely affected. b) plants have an increased resistance to insect pests. c) there is an increased need for inorganic fertilizers. d) genetically engineered plants may have a longer shelf life.

Option a

Explanation:

Biotechnology is the branch which deals with the most advanced techniques which is required to make the life easy.

One of the most important application is Genetically modified crops. Genetically modified crops are pest resistant and have many advantages.

There are few disadvantages one of them is beneficial insects are also adversely affected. There are many useful insects that helps in pollination and    they are also killed because of pest resistant plant.

hence the correct answer is option A

i don't know. if i were you, i would search it up online : d

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.