One of the simplest definitions of a life-form is anything with the capacity to reproduce and regulate itself. Before life began, the complex organic, or hydrocarbon-bearing, molecules that makeup RNA and DNA, the building blocks of life, must have formed. No one knows exactly how life is formed from these molecules, but many ideas have been put forward. As you enter this area, go toward the large video screen on the right and explore the “Life at the hydrothermal Vents” label deck. Some scientists theorize that life begins at deep-sea vents. Find three lines of evidence to support this claim.

The primary purpose of cellular respiration is to produce a molecule (ATP) that supplies energy to the cell. To aid cell growth, O B creates cellular structures. For creatures to breathe, O C produces oxygen. In prokaryotic cells, D creates a nucleus.

1) Select the concept below that best demonstrates compartmentalization of function in living things. Group of answer choices horizontal gene transfer flatness of flatworms organelles in eukaryotic cells circular chromosome of prokaryotic cells the Miller-Urey experiment gastrovascular cavity the RNA World hypothesis

You are studying the evolution of species. After performing DNA analysis, he discovers a gene that is conserved from yeast to humans. In which cellular processes is this gene most like to be involved? Could this gene have evolved to confer some of the complex traits that we observe in modern animals, like multicellularity? Briefly explain.

Bacteria are by far the most numerous organisms on earth.  Some estimates indicate that the total biomass of bacteria is  larger than that of all plants and animals, despite their tiny size.  However, biologists' knowledge of bacteria is very uneven.  In some ways, biologists know more about certain bacteria than we do about most animals, including humans.  In other ways, biologists still know very little about bacteria and the Bacteria Kingdom.  For example, there might be about a million species of bacteria, or there could be billions of different species.   Think about benefits and complications related to the biological study and knowledge of bacteria.  What are some ways in which bacteria are very well-known and/or easy to study?  What are some ways in which bacteria are very poorly-known and/or difficult to study (other than the total number of species).  Discuss how this relates to technology, other developments in biological research, and/or characteristics of the bacteria…

A scientist discovered a new group of unicellular organisms that lack mitochondria but possess an organelle related to the endoplasmic reticulum and is involved in energy production. The scientist hypothesizes that this organelle might be a missing link in the evolution of mitochondria. A) Do you agree with this hypothesis? Explain. B) Based on the available evidence, what is the most likely hypothesis for the origin of mitochondria? Provide four pieces of evidence to support this theory and justify why they are valid.

Critics of evolution often cite the fact that several hypotheses are being tested to help explain various stages of the origin of life. Explain how having several hypotheses for the evolution of monomers does not negate the fact that evolution of monomers was the first stage in the evolution of life?

What led to the discovery of the three domains of life? Group of answer choices comparing cell wall biochemistry comparing enzymes in glycolysis comparing genetic sequences for ribosomes 5

Describe the step-wise process of how inorganic matter on primitive Earth evolved into multicellular, eukaryotic cells.  Be sure to provide enough detail with each step and make sure you cover inorganic, organic, protocells, prokaryotic, energetics, eukaryotic, and multi-cellularity

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