The bottleneck effect is when the population of a species is reduced due to an environmental disaster or human activities. An example of the bottleneck effect is "Insecticide spraying eliminates all but a few of the beetles on an island". For the species to survive, the green beetle will either have to move to a new location and build a new colony or they will have to develop a resistance to the insecticide and then start to rebuild the existing colony
The Phospholipid Bilayer is the molecule that forms the cell membrane.
The formula for density is Mass/Volume,
so the first point on the left the density is 1 g/cm3
the second point in the middle has a density of 1.2 g/cm3
the third point at the top right has a density of 1.6 g/cm3
the last point in the bottom right has a density of 0.083 g/cm3
Answer - D
The body's somatic cells have diploid number of chromosomes hence the body cells would have 36 chromosomes. Gametes always have half the number of chromosomes compared to the somatic cells so in this case, gametes would have 18 chromosomes.
Antibiotics are ineffective against viruses because viruses do not have cells. Viruses are infectious agents that live within the cells of other living things. Antibiotics work by breaking down the cell walls of bacteria or interfering with the bacteria's ability to repair its cell's DNA, according to How Stuff Works