Answer: Peptide bond
Explanation: A peptide bond is a type covalent bond that joins two amino acid molecules. It is formed by the removal of elements of water from a carboxyl group of one amino acid and an amino group of another amino acid. It is a condensation reaction that results in the formation of dipeptide molecule. Three amino acids can be joined by a peptide bond to form a tripeptide.
The principle that physical changes in organism during their lifetime such as greater development of an organ or a part through increased use could be transmitted to their offspring
The correct answer is option C, Mutations have arisen that may have altered allele frequencies
There have been several instances where mutation in the gene of an insect is caused due to the harmful external environmental condition which are either created or occurs naturally. Usually, the organisms evolve themselves to sustain in an adverse environment condition. In the process of evolution, they go through the process of positive genetic mutation but sometimes the mutation may also produce negative effect on the DNA of an species through wrong or inefficient pairing/coding. Here in this case it can be stated that the chemical sprayed on insects might have attacked the gene pool of the insects thereby producing adverse genetic mutation.
Answer:
c
Explanation:
Critical mass, in nuclear physics, the minimum amount of a given fissile material necessary to achieve a self-sustaining fission chain reaction under stated conditions.
Answer:Polygenic inheritance
Explanation:
Polygenic inheritance is a trait in which multiple genes are responsible for the expression of a single trait. It is also influenced by the environmental factors. For example, skin color. The skin color is infleunce by the genes inherited from parents and also infleunced by the environmental factor like sunlight, prolonged summer season and others.