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TLS Online TPP Program

#Question id: 10206

The excess energy is absorbed by three carotenoids molecules such as violaxanthin, antheraxanthin, and zeaxanthin, which of the following statements correct about these molecules?

#Unit 6. System Physiology – Plant
  1. Both of the aromatic rings of violaxanthin have a bound oxygen atom while antheraxanthin only one of the two rings has a bound oxygen and in zeaxanthin neither does
  2. Zeaxanthin is the least effective of the three xanthophylls molecules in heat dissipation
  3. the level of zeaxanthin remains relatively constant throughout the day
  4. the antheraxanthin content increases at high PPFD and decreases at low PPFD
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TLS Online TPP Program

#Question id: 12552

#Unit 10. Ecological Principles

To measure the population of lake trout in a 250 hectare lake, 200 individuals were netted and marked with a fin clip, and then returned to the lake. The next week, the lake is netted again, and out of the 200 lake trout that are caught, 50 have fin clips. Using the capture-recapture estimate, the lake trout population size could be closest to which of the following?
TLS Online TPP Program

#Question id: 12553

#Unit 10. Ecological Principles

Which of the following assumptions have to be made regarding the capture -recapture estimate of population size?
I. Marked and unmarked individuals have the same probability of being trapped.
II.    The marked individuals have thoroughly mixed with population after being marked.
III.  No individuals have entered or left the population by immigration or emigration, and no individuals have been added by birth or eliminated by death during the course of the estimate.
TLS Online TPP Program

#Question id: 12554

#Unit 10. Ecological Principles

Long-term studies of Belding's ground squirrels show that immigrants move nearly 2 km from where they are born and make up 1 to 8% of the males and 0.7 to 6% of the females in other populations. On an evolutionary scale, why is this significant?
TLS Online TPP Program

#Question id: 12555

#Unit 10. Ecological Principles

Demography is the study of
TLS Online TPP Program

#Question id: 12556

#Unit 10. Ecological Principles

Natural selection has led to the evolution of diverse natural history strategies, which have in common
TLS Online TPP Program

#Question id: 12557

#Unit 10. Ecological Principles

Natural selection involves energetic trade-offs between