Answer:
a. The original spraying has caused a permanent mutation, giving the insects genetic resistance to the spray.
Explanation:
This is a practical evidences of mutation and variation, as mechanisms of evolution.
The insecticide is the selective pressure. As a results of continuous spray, the parents of the present mosquitoes must have acquired certain characteristics or traits by gene mutation which makes them resistant to the selective pressure (insecticides), and therefore survive the spray in the past.
Therefore when these resistant parents mated, with high reproductive success (leading to large gene pool of these traits,); variation in the genetic composition increases as the resistant gene is passed from generations to generations in the population. Therefore, the population of present day mosquito with genetic resistance to insecticides increases.They are therefore naturally selected, and able to survive as the present day mosquitoes with high resistance to insecticides.
Answer:(ﾉ◕ヮ◕)ﾉ*:･ﾟ✧ The light areas of the Moon are known as the highlands. The dark features, called maria (Latin for seas), are impact basins that were filled with lava between 4.2 and 1.2 billion years ago.
Explanation: (∩^o^)⊃━H~O~P~E T~H~I~S H~E~L~P~S!~
Explanation:
Vascular plants have two distinct organ systems: a shoot system, and a root system. The shoot system consists stems, leaves, and the reproductive parts of the plant (flowers and fruits). The shoot system generally grows above ground, where it absorbs the light needed for photosynthesis.
<u>#</u><u>C</u><u>a</u><u>r</u><u>r</u><u>y</u><u> </u><u>(</u><u>n </u><u>Learning</u>
<span>Genomic libraries can be constructed using phages. A phage, also called bacteriophage, is a virus which effects bacteria. There are more phages than any other organism in the world. Phages can be used for treatment of infections of the bacterial type.</span>
Nucleic acids are polymerized by the formation of peptide bonds between nucleotides.
