Exam 13: Early Life Forms and the Viruses

The close relationship between ____ and animals can be seen in the similarity of these protists and sponges, simple animals.

The ____ began in 2007 and aims to classify the microorganisms the human body supports and how they impact overall health.

Evidence supporting the lack of oxygen on early Earth includes _____.

Place the following hypothesized events of the beginning of life in their correct order. I.organic polymers form II.inorganic molecules form III.DNA-based cells form IV.organic monomers form V. protocells in the RNA world form

Some bacteria in the deep oceans use iron as an energy source to make carbohydrates from carbon dioxide. These bacteria would be classified as ____.

____ is the best studied species of bacteria.

The appearance of _____ on Earth due to the action of photosynthetic bacteria occurred about 2.7 billion years ago.

Plasmodium is a(n)____.

G. lamblia infection in the gut ____; therefore, some people may be benefited by the presence of this protist.

The theory that early metabolic reactions occurred in rocks near hydrothermal vents is known as the _____hypothesis.

The first eukaryotic cells were ____.

Foraminifera are predatory protists with a ____ shell, which is the ultimate source of _____.

The ____ spend most of their lives as individual haploid organisms.

The ____ form of Plasmodium is transferred to  humans through the bite of an infected mosquito.

According to scientific evidence, the first organisms on Earth must have been ____.

Some archaea are extreme halophiles. This means that they thrive in ___ conditions.

Anaerobic methanogens produce ____.