The following image is of a diatom. It lives in water and gets food from photosynthesis. It is encased in a hard shell made of something similar to glass or sand.

Image by Damián H. Zanette

A diatom is a(n) because it has .

A diatom is a(n) autotrophic algae because it has chlorophyll.

Explanation:

Diatom is a type of unicellular and eukaryotic algae which has the ability to make their own food like plants from sunlight due to the presence of chlorophyll pigment. Diatom helps in fixation of carbon in the process of photosynthesis. About 20 percent of carbon fixes by diatom and plays an important role in climate change. It lives in water and provides food for many herbivores.

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

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