3. A widely accepted bypothesis about the origin of 5. Ciproixacm os oke efficie

Question

3. A widely accepted bypothesis about the origin of 5. Ciproixacm os oke efficient weight gain. life on Earth is that life arose approximately 3.5 billion years ago as the result of a complex sequence of chemical reactions that took place spontaneously in Earth's atmosphere. Another hypothesis about the origin of life suggests that life began somewhere else in the universe and livestock to promote efficient weight gaS of the bacterium Campylobacter jejuni n colonize the digestive tracts of livestock C. jejuni can be transferred to people through the handling and consumption of contaminated mea People infected with C.jejuni also are treated with ciprofloxacin arrived on Earth by chance Which of the following questions might scientists been life on Mars? Which of the following is the most likely consequence of adding ciprofloxacin to animal feed? ask to most reliably determine if there has ever (A) How far from Earth was Mars 3.5 billion (B) Is there scientific proof that Earth ever had (C) Did Mars have the elements present in its (D) Was there oxygen gas on Mars 3.5 billion (A) Naturally occurring strains of C. jejuni will reproduce more rapidly in the digestive tracts of livestock, reducing the risk of food-borne illnesses in people. years ago? an oxygen-free atmosphere? atmosphere to support life? years ago? (B) Ciprofloxacin-resistant strains of C. jejuni will have a selective advantage in the digestive tracts of livestock, increasing the risk of serious infections in people 4. Cortisol is a hormone produced in response to (C) Ciprofloxacin-sensitive strains of C.jejuni will be consumed in meat that contains a chemical that inhibits bacterial growth, reducing the risk of food poisoning in stress, including starvation, in humans. Which of the following is most likely an immediate effect of a starvation-induced increase in cortisol secretion? (A) Increased activation of the immune system (C) Increased bone and collagen formation (D) Actively growing strains of C. jejuni will metabolize the nutrients in meat produced by livestock operations, increasing the risk of protein deficiencies in people. (D) Increased mobilization of fatty acids from fat

Explanation / Answer

Ans.

3- "did mars have the elements present in its atmosphere to support life?" scientist should ask this question to most reliably determine if there has ever been life on mars.

4- (D) increased mobilization of fatty acids from fat cells.

in starvation the body has depleted all the carbohydrate sources, hence cortisol mobilizes fatty acids from fat cells for their use in energy production to sustain important body functions.

5- (B)

the most likely consequence of adding ciprofloxacin to animal feed will be the selective advantage to the resistant strain of C. jejuni, which will increase the risk of serious infection in the people.

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