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The evolution of oxygenic photosynthesis is considered one of the most important

ID: 79584 • Letter: T

Question

The evolution of oxygenic photosynthesis is considered one of the most important in the history of life on Earth because. A. It was the was the first process for the fixation of carbon dioxide (CO_2) into organic matter B. It completed carbon cycle C. it led to the formation of molecular oxygen (O_2) and the subsequent oxygenation of the biosphere and the atmosphere D. It was the first process that captured light energy and converted it to chemical energy in the form of ATP A viral genome may take which of the following forms? A. All genomes are DNA double helices B. RNA C. DNA D. Since some viruses have DNA genomes and others have RNA genomes, both answer b & c are correct. The human body typically begins to be colonized by its normal biota A. Before birth, in utero B. During and immediately after birth C. When a child first goes to school Which of the following is NOT necessary for a successful PCR reaction? A. Primers B. DNA polymerase C. ligase D. DNA template The Archaea are A. primarily ancient organisms that have not evolved very much in the last billion years. B. Phylogenetically divers, but restricted to extremophile and chemolithotrophs. C. diverse microorganisms that inhabit almost every environment on Earth, including the colon of humans and mammals. D. functionally diverse, but restricted to thermophilic or hyperthermophilc environments. __ is to bacterial cell walls as is to fungal cel walls. A. Pseudomurein; chitin B. Peptidoglylcan; cellulose C. Cellulose, chitin D. Peptidoglylcan; chitin Booster vaccines are often given to improve which response in a patient? A. Anaphylactic B. Atopic C. Anamnestic D. Allergic E. Attentuated Which is TRUE regarding phagocytosis? A. In Gram-positive intoxication, signs and symptoms peak following phagolysosome action B. In Gram-negative infection, signs and symptoms peak prior to acton C. Both statements are true D. Neither statement is true Which type of vaccine is made only from parts of viruses or cells? A. Attenuated B. Submit C. Denatured E. Whole cell Put these events of phagocytosis in the correct sequence: 1. Formation of phagosome 2. Digestion by lysosome 3. Chemotaxis 4. Release of debris 5. Engulfment of bacteria A. 3-5-1-2-4 B. 5-3-1-2-4 C. 1-2-5-3-4 D, 2-5-1-3-4 E. 4-5-3-1-2 5-1-2-4 Dogs do not acquire feline immunodeficiency leukemia from cats. This is an example of: A. Innate immunity B. Cellular immunity C. Passive immunity D. Active immunity E. Humoral immunity A primary elevation of IgM titer occurs with: A. Initial sensitization to an antigen B. systemic anaphylaxis C. Anamnestic response D. Delayed type hypersensitivity E. Booster vaccination

Explanation / Answer

77. Option C is the right answer.

Oxygenic photosynthesis is considered to be one of the most important in the history of origin of life because oxygen produces in this process by the cyanobacteria results in oxygenation of the oceans and atmosphere which further results in origin of aerobic respiration and then evolution of complex and large organisms.

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