Two genes for the same trait are compared. which one is not an example of a mutation? a). in the first, the series is adenine followed by two thymine; in the second, adenine is followed by two thymine. b). in the first, the series is cytosine - adenine - thymine; in the second, it is cytosine - adenine - adenine. c). the first has thymine where the second has a guanine. d).the first has a series of three nucleotide bases; the other has a series of four.

the correct option is option d

wild parsnip is a perennial plant which reproduces rapidly in areas which have no sign of agricultural activity such roadside or at no tillage open areas. it's considered invasive because it can inhibit the growth of another plant  and its reproduction is fast. there are several harmful effects of this invasive plant although its taproot is edible since it is a member of the carrot family. wild parsnips can cause skin blistering when in contact because of the chemicals it contains, second it inhibits the growth of other plants, it will restrict the growth of animals when eaten and lastly, it drives away natural pollinators like bees.

the species living around the vents are especially good at dispersal.  

deep-sea vent originates on the floor of the ocean when seawater circulates through hot volcanic rocks, usually situated where the new oceanic crust is being produced.  

biological dispersal refers to the movement of species from their location of birth to their site of breeding, or from breeding site to another. similarly, the oceanic dispersal refers to the movement of the species from one land mass to another by sea crossing.