Which of the following describes a properly controlled experiment?
A. Fifteen turtles are fed iceberg lettuce and vitamins, while another
fifteen turtles are fed only iceberg lettuce.
B. Twenty mice are fed doughnuts every day and their weight is
measured after two months.
C. A poll is taken to determine the most popular website ever.
D. Five radish seeds are planted in an outdoor garden that gets lots
of sun and water.

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus

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.