7,418-441, and 452-473 in your textbook and discussions 70s-74s in the study gui

Question

7,418-441, and 452-473 in your textbook and discussions 70s-74s in the study guide. Circle T if the statement is true; F if it is false. 1. TF Earth's early atmosphere had little or no free oxygen. 2. TF Scientist 3·T F Most of the species that have ever lived are still in existence. 4, T F Fossils can normally withstand the heat and pressure of igneous and s have concluded that Earth became solidified about 4.6 billion years ago. metamorphic rock. The actual age of rocks can be determined by radioactive dating. Spontaneous generation is the concept that living organisms can come from 5. TF 6. TF nonliving matter TF Redi's experiments were accepted by all as proof of the theory of biogenesis 7. T F Miller and Urey performed an experiment that showed that organic molecules coud be made from inorganic compounds. F Scientists know what the first cells were like based on fossil evidence. 9. T 0. T F The endosymbiont theory is generally accepted at least as to the formation of mitochondria and chloroplasts. Darwin was the only scientist to propose a theory of evolution Similar structures that are inherited from a common ancestor are called I. TF 2. T F analogous structures. continue F The fossil record provides little evidence for evolutionary change of organisms 3. T

Explanation / Answer

1. True. Earth's early atmosphere had little or no oxygen.

3. False. Most of the species that have ever lived are still in existence.

4. False. Fossils cannot withstand heat and pressure of igneous and metamorphic rocks.

5. True. The actual age of rocks can be determined by radioactive dating.

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