People once believed fish could form from the mud in a pond that sometimes dried up. How could you demonstrate that this conclusion is false?

RNA is copied the same way that DNA is copied-by base pairing. RNA, unlike double-stranded DNA, exists as a single strand. If a ribozyme is copied, would the copy be another identical ribozyme or something else? If the copy is not identical to the original, explain how could the original be replicated.

According to a recent hypothesis, lightning may not have existed on early Earth. Explain how could you modify the Miller-Urey experiment to reflect this new idea. What sources of energy could you use to replace lightning?

Use the following terms to create a concept map illustrating the theory of endosymbiosis: anaerobic prokaryotes, eukaryotes, cyanobacteria, aerobic prokaryotes, endosymbiosis, mitochondria, and chloroplasts.

Explain how the formation of the ozone layer permitted organisms to colonize land.

How does the principle of biogenesis pose a scientific question regarding the origin of life on Earth?

Describe the conditions under which the ability to bind oxygen gas is an advantage to a cell.

Explain why many scientists who investigate the origin of life have focused on RNA chemistry.

Identify three reasons for an increase in extinct rates over the last 515 years:

Complete the sentence. _ is a measurement of the force of air molecules in the atmosphere at a given altitude.

1. What kind of exercises would you do to increase cardiorespiratory endurance?

Write the expressions 5 + x and 3 + x in the form x + a. What property allows the expressions to be written in this form?

Find the sum and the difference for the pair of polynomials.

$$\begin{array} { l } { 4 x ^ { 4 } + 8 x ^ { 3 } + 16 x ^ { 2 } + 4 } \\ { 4 x ^ { 3 } + 2 x ^ { 2 } + 16 x } \end{array}$$

Compare the hypothesis tested in the Miller-Urey experiment with subsequent hypotheses about the conditions under which life may have first formed on Earth.