#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?
#Question id: 1669
#Immunology
What is the percentage of human peripheral blood T-cells bearing a γδ T-cell receptor?
#Question id: 1539
#Immunology
Regulatory T cell (TREG) have identified by the presence of
#Question id: 1670
#Immunology
The T-cell receptor genes were originally identified using: