Ray has a new hobby - he is raising a group of brine shrimp, which are marketed
ID: 45388 • Letter: R
Question
Ray has a new hobby - he is raising a group of brine shrimp, which are marketed under the brand name ''Sea Monkeys.'' His population has 158 individuals. In its first generation, he observes 71 new individuals born, and 58 individuals that die. For that first generation, what is the per capita rate of growth for this population? (1 pt) A. -0.04 B. 0 C. 0.5 D. 0.02 E. 0.08 G. 0.3 Ray assumes that this population will grow exponentially. How many generations should it take this population to reach at least 316 individuals? (1 pt)Explanation / Answer
Q5). The initial population is 158, and the population after one generation is increased by 13 (71-58). The per capita growth for this population X = 1 * 13 / 158 = 0.08.
Thus, the correct option is E. 0.08
Q6). Percent growth rate of the given population is, = Vpresent - Vpast / Vpast * 100
= 171 - 158 / 158 * 100
= 8.22
Formula to calculate doubling time of a population = 69.3/ growth rate
= 69.3/ 8.22 = 9 (apprximately)
Thus, the correct option is C. 9
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