#Question id: 11270
#Botany
Consumption efficiency is the proportion of production at one trophic level that is eaten by, or ingested, by the next trophic level which of the following is correct statement?
A. Consumption efficiencies of herbivore is higher in ocean than grassland
B. In aquatic ecosystems, production efficiencies of herbivore are greater than carnivores
C. Assimilation efficiencies for carnivores are typically higher than those of herbivores
D. Assimilation efficiency depends on the quality of food eaten and the physiological efficiency of the consumer
#Question id: 11294
#Botany
A small lake has three trophic level – Phytoplankton(autotroph) , Zooplankton (herbivore ) and planktivorous fish ( primary carnivore) . In to this lake Population of some other primary carnivore introduced to study top down effect . What is expected long term consequence of this introduction ?
#Question id: 11277
#Botany
If a species is a keystone predator, then its removal from a community should
(A) Increase population size of the predator’s preferred prey
(B) decrease species diversity in the prey community
(C) decrease productivity of the predator’s preferred prey
(D) increase species diversity in the prey community
#Question id: 11278
#Botany
Which of the following is true with respect to oligotrophic lakes and eutrophic lakes?
A) Oligotrophic lakes are less subject to oxygen depletion.
B) Rates of photosynthesis are lower in eutrophic lakes.
C) Eutrophic lake water contains higher concentrations of nutrients.
D)Sediments in oligotrophic lakes contain larger amounts of decomposable organic matter.
#Question id: 11280
#Botany
Ecosystem services include processes that increase the quality of the abiotic environment. Which of the following processes would fall under this category?
#Question id: 11281
#Botany
Owls eat rats, mice, shrews, and small birds. Assume that, over a period of time, an owl consumes 5,000 J of animal material. The owl loses 2,300 J in feces and owl pellets and uses 2,500 J for cellular respiration. What is the production efficiency of this owl?