Exam 4

Question 1

According to the 10% rule, a lonely Swainson’s Hawk living in a field weighing about 1100 grams would require how many mice per year to sustain the it if each mouse weighs about 40 grams? _____________ mice

Answer 1

275

Question 2

What is the cause of a decline in photosynthetic protists on the sea surface?

Answer 2

warming surface water acts as a barrier to upwelling of nutrient rich ocean bottom water

Question 3

Eutrophic lakes are…

Answer 3

nutrient-rich and oxygen poor in the deep.

Question 4

Match the following to the extinction vortex diagram

Answer 4

Small population
inbreeding and genetic drift
Loss of genetic variability
lower fitness and population adaptability
lower reproduction and higher mortality

Question 5

Select all of the following that are dangers for the thawing permafrost.

Answer 5

ancient dormant diseases getting released

further greenhouse gases releasing

ground collapse

Question 6

On average, 1/6 of the food we eat go toward…

Answer 6

adding or repairing tissue (i.e. biomass)

Question 7

You and your family and friends decide to move to a deserted island for a total of 100 starting population. After the 1st year there are 7 new births and 1 death. Using this information you try to determine what the population will be at the end of 5 years. This comes out to be what amount?

Answer 7

133.5

Question 8

According to the 10% rule, which of the following statements is false?

Answer 8

Eating meat reduces our dependence on producers overall.

Question 9

Which of the following is not correct?

Answer 9

Competition for resources is the sole driver of adaptation of species.

Question 10

Half of the food we eat…

Answer 10

exits the body in feces

Question 11

Which of the following is not correct?

Answer 11

P-values less than 0.05 are said to be insignificant.

Question 12

Which of the following is false?

Answer 12

Birth control pills enter the ecosystem only when users discard older prescriptions, which can effect the sex ratio of fish.