Examine and explain the connections between Stanley Miller's experiments and the importance of the evolution of photosynthesis to the current state of life on Earth
What will be an ideal response?
Although Miller's experiments demonstrated that physical forces on Earth could produce organic molecules, the amount produced would have been limited, and, therefore, the expansion of life on Earth would also have been limited. Photosynthesis provided a way for enormous amounts of organic molecules to be produced as food and building materials for all life. The number and diversity of life-forms we have today would not exist without those organic materials. Also, photosynthesis produced oxygen that allowed the evolution of aerobic respiration, a highly efficient means of providing energy to larger organisms. Without it, evolution may have stalled at the microscopic level.
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Differentiation refers to the process by which:
A. fertilized eggs undergo multiple rounds of cell division to become embryos. B. changes in gene expression allow cells to produce the correct proteins at the correct time. C. cells become progressively more specialized during development. D. gene regulation determines which proteins are produced in a given cell during development. E. None of these choices are correct.
This type of tissue is rich in extracellular matrix and includes tendon and cartilage.
A. muscle B. connective C. epithelial D. nervous E. hepatic
The reaction ATP + H2O ? ADP + Pi is classified as an:
a. endergonic reaction. b. enthalpy reaction. c. entropy reaction. d. exergonic reaction. e. electrochemical reaction
Both capsules and endospores..
a. are created in harsh conditions b. are a method of protection c. look like a halo d. are stained green