AP Biology Practice Exam 2 ❮ 29343.From the transpiration rate data, it appears that
transpiration rate rises as
A. temperature ↑, wind speed ↓, humidity ↓
B. temperature ↑, wind speed ↑, humidity ↓
C. temperature ↑, wind speed ↑, humidity ↑
D. temperature ↓, wind speed ↑, humidity ↑
44.According to the Rf values given in the preced-
ing smaller table, which pigment would migrate
the fastest on chromatography paper?
A. Xanthophyll
B. Chlorophyll a
C. Chlorophyll b
D. Beta carotene
- From the transpiration rate data presented in the
preceding larger table, which of the following plants
appears to be most resistant to transpiration?
A. Plant A
B. Plant B
C. Plant C
D. Plants B and C are similarly resistant
Questions 46–48: A population of rodents is studied
over the course of 100 generations to examine changes
in dental enamel thickness. Species that are adapted to
eat food resources that require high levels of processing
have thicker enamel than do those that eat softer, more
easily processed foods. Answer the following questions
using this information and the curves that follow.
46.How is average enamel thickness changing in
this population?
A. There is no real change.
B. The color and size are changing.
C. It is increasing.
D. It is decreasing.
47.You randomly pick one data point from all three
sets of data (all three generations), and the indi-
vidual’s enamel thickness score is 15. Which of
the following can be inferred?
A. The individual comes from generation 1.
B. The individual comes from generation 50.
C. The individual comes from generation 100.
D. The individual could be from any of these
generations.
48.What inference can you make about this species’
diet?
A. Its food resources are getting softer and easier
to process.
B. Its food resources are getting harder and
more difficult to process.
C. The population is growing.
D. The population is shrinking.Transpiration Rate →1.0=Control Rate (All Leaves Have the Same Surface Area)
HUMIDITY HUMIDITY HUMIDITY WIND WIND WIND
PLANT T*10°C T15°C T20°C 20% 15% 10% 5 MPH† 10 MPH 15 MPH
A 1.042 1.105 1.211 1.121 1.130 1.205 1.001 1.025 1.100
B 0.600 0.800 1.000 0.851 0.910 0.950 0.760 0.785 0.810
C 1.240 1.245 1.251 1.411 1.519 1.550 1.214 1.240 1.301
∗Temperature
†Miles per hour
Freq. Freq. Freq.5 10 15 20 5 10 15 20 5 10 15 20
Original 50th generation 100th generationhttp://www.ebook3000.com