Exam 5: The Nature of Life on Earth

The most numerous life on Earth is

The resistance of bacteria to certain antibiotics is a current example of

Branch lengths in the tree of life are a measure of the

Eukaryotes

Organisms that are found living kilometers beneath Earth's crust are referred to as

The process of converting a sequence of nucleotides in RNA into a protein is called

What is the main factor that drives Darwinian evolution?

Humans are scientifically classified as Homo sapiens. In this system, the word Homo refers to the

A chemoautotroph gets its energy from

What is the maximum number of atoms that carbon can bond to?

Energy utilization in living organisms is

Different dog breeds have been bred by humans from a common ancestor over the past few thousand years. This is an example of

Why might we think that silicon would be an obvious alternative to carbon as a building block for biological molecules?

Simple molecules containing only carbon and hydrogen are referred to as

A section of DNA that does not correspond to a known protein is referred to as

The search for Earth-like extraterrestrial life is essentially a search for

Which forms of life on Earth show the greatest diversity?

According to Darwin, in the struggle for survival, those individuals whose traits best enable them to survive and reproduce will, on average, leave the largest number of offspring that in turn survive to reproduce. This is the basic idea behind his theory of

All organisms have finite lifetimes and eventually die. Which of the basic characteristics of life corrects for this?

Which of the following molecules does not occur in left- and right-handed forms (carbon is the central atom and the groups around this central atom are in parentheses)?