#1 Suppose that sample of beef broth initially contains 16 bacterial cells. After 4.0 h, there are 1.6 x 106 bacterial cells in the sample. Calculate the growth rate of the bacterial population for the given time interval. 1 mark
Record the answer in scientific notation: x X 10n, rounded to one decimal place.
------ X 10^ ------ bacteria / hour
#2 The Alberta greater sage-grouse population was about 4375 in 1970. By 2002, the population was estimated to be only about 350 birds. Calculate the growth rate for the population from 1970 to 2002.
1 mark.
Enter the answer to the nearest integer.
-------- grouse / year
#3 Lemna minor, a species of duckweed, can reproduce to form new plants very quickly. Suppose that a small backyard pond contains 25 Lemna minor plants, and the expected growth rate of the population is 1.0 x 102 plants per day. Predict how many Lemna minor plants the pond will contain after 31 days. 1 mark
Enter the answer to the nearest whole number.
--------- plants
#4 According to population surveys of piping plover, 34 of these birds on Dowling Lake, Alberta, in 1992. The next year, the population of piping plover on Dowling Lake was 39. Calculate the per capita growth rate for the piping plover population during the entire survey period. 1 mark
Record the answer with two significant digits.
------------
#5Between 1996 and 2001, Cochrane, Alberta, was the fastest growing municipality in Canada with a per capita growth rate of 0.589. About 7424 people lived in Cochrane in 1996. How many people lived there in 2001? 1 mark
Enter the answer to the nearest whole number.
----------- people
#6 he experimentally re-introduced grey wolf population of Idaho was 310 at the beginning of 2004. During the year, 112 pups were born and 49 individuals died or were removed from the study area. Calculate the per capita growth rate of this grey wolf population during the study period.
Record the answer as two significant digits.
#7 Lemna minor, a species of duckweed, can reproduce to form new plants very quickly. Suppose that a small backyard pond of 100 L contains 25 Lemna minor plants, and the expected growth rate of the population is 1.0 x 102 plants per day.
Record the answer to three significant digits.
Numerical Response: The density of the Duckweed population on the 150th day is _______ /mL.
#9 The Loggerhead Shrike (Lannius ludovicianus) is considered by the Committee on the Status of Endangered Wildlife in Canada to be of "special concern" in Alberta. Within a study area in 1998, 232 shrikes were observed at 144 locations. Over the next five years, 52 new shrikes were born and 116 died or left the area.
Numerical Response:
(a) Calculate the growth rate of this shrike population during the study period. 1 mark
Enter the answer as a whole number.
----------- shrikes / year
(b) How large was the shrike population in 2003? 1 mark
Enter the answer as a whole number.
--------- shrikes
#10 Suppose that a population of 3 500 Zebra mussels occupied a rectangular territory 2.00 m by 2.00 m. Calculate the average density of the Zebra mussel population.
Record the answer to three significant digits.
-------- m2
#11 Given that one Zebra mussel releases one million eggs per spawning and assuming that the survival rate is 0.020%, calculate the maximum number of surviving individuals produced in two generations originating with one mussel. Express your answer in scientific notation in the form x X 10y mussels.
Record the answer to two significant digits.
------- X 10^ ------- mussels
#12 If the size of a grizzly bear population is 0.4 bears / 200 km2, calculate the size of the grizzly bear population in an area of 5 000 km2.
Record the answer as a whole number.
------- grizzly bears
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