Biologists think that all organisms alive today descended from organisms that lived before. In fact, they feel that we can trace any living organism back to the origin of life on Earth. Explain how metabolism fits into this thinking
What will be an ideal response?
Despite the vast diversity of living organisms, they all have very similar metabolic machinery and the metabolic pathways are very similar. This suggests that these evolved in common ancestors. Since all organisms share these similarities, it suggests that all life can be traced back to the original living organisms on Earth.
Analyze and Evaluate the Concepts (Essay)
You might also like to view...
Pathogens or disease-causing agents are typically found in which two domains?
a. Archaea and Bacteria b. Bacteria and Eukarya c. Archaea and Eukarya d. Prokarya and Eukarya
Four of the five choices listed below are involved
directly in water movement through plants. Select the exception. a. negative pressure b. transpiration c. cohesion-tension d. tension in xylem e. photosynthesis
Most small molecules are permeable across
a. both mitochondrial membranes. b. the inner, but not the outer, mitochondrial membrane. c. the outer, but not the inner, mitochondrial membrane. d. neither mitochondrial membrane.
Escherichia coli and Clostridium acetobutylicum are reported to be derived from a common ancestor. They have some similar, but not identical gene sequences. What is the best explanation for this difference in genetic coding?
A. The two species never diverged, but were discovered by two different scientists and given different names. B. The two species are not closely related, but E. coli passed the similar gene sequences to C. acetobutylicum via horizontal gene transfer. C. After the two species diverged, the similar gene sequences evolved through convergent evolution. D. After the two species diverged, the genes accumulated random mutations that resulted in similar, but not identical gene sequences.