Reference no: EM133293035

Question 1. With about 400,000 people ill and over 100 deaths, the largest waterborne human disease outbreak to date in the United States was caused in 1993 by the intestinal parasite Cryptosporidium parvum in Milwaukee, Wisconsin. To what group of protists does this organism belong?

a) Discoba

b) Metamonada

c) Amoebozoa

d) Alveolata

e) Heterokonta

Question 2.

Diatoms are found in both fresh and marine waters. They have an external shell of silica where half is inherited from its parent cell and it produces a new, smaller half that fits within it. How have these organisms dealt with the decrease in size with each generation?

a) That lineage declines in size until it dies out.

b) In times of high food availability, the diatom abandons its shell entirely and forms a new, larger one.

c) The diatom form gametes; after fertilization, the zygote develops into an auxospore which is capable of making a new shell.

d) The diatom spends a large extent of its life cycle outside a shell, thus reducing the problem of generational size decline.

e) The diatom steals a shell from a larger diatom after evicting it if it can.

Question 3.

Which major advance in genomic analysis has revealed a large number of previously unknown archaeal phyla?

a) single-cell genomics

b) environmental DNA isolation

c) improved PCR primers

d) hybrid sequences

e) advanced culturing techniques