Exam 15: The Evolution of Microbial Life

According to this evolutionary tree,the archaea and eukaryotes last shared a common ancestor ________.

All of the following are true EXCEPT one.Choose the exception.

Scientists hypothesize that disrupting our ________ communities may increase our susceptibility to infectious diseases,predispose us to certain cancers,and contribute to conditions such as asthma and other allergies,irritable bowel syndrome,Crohn's disease,and autism.

Animal life underwent its greatest diversification during the ________,which began about ________ million years ago.

Under ideal conditions,prokaryotes are capable of reproducing at a(n)________ rate.

All organisms that photosynthesize fit into which nutritional category?

________ are responsible for toxic red tides.

Trichomonas vaginalis is a protozoan that feeds on white blood cells and bacteria living on the cells lining the female human vagina,thereby creating a common sexually transmitted disease often known as "trich." The feeding mechanism of this protozoan makes it a ________.

Under what abiotic conditions can monomers spontaneously form polymers?

Food poisoning from Salmonella occurs because of ________.

Endosymbiosis explains the origin of the ________ of eukaryotes.

Which of the following are most closely related to plants?

Bacilli are ________ prokaryotes.

Large amounts of oxygen gas appeared in Earth's atmosphere about ________ years ago.

Land was first colonized about ________ years ago.

Variation among pre-cells was due to ________.

Flagellates,amoebas,apicomplexans,and ciliates are all what type of protist?

In Yellowstone National Park,hot springs can reach temperatures of 205°F (96°C).Despite these high temperatures,Aquifex bacteria flourish.How might you classify Aquifex bacteria?