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TLS Online TPP Program

#Question id: 12779

Suppose you are studying the nitrogen cycling in a pond ecosystem over the course of a year. While you are collecting data, a flock of 100 Canada geese lands and spends the night during a fall migration. What could you do to eliminate error in your study as a result of this event?

#Unit 10. Ecological Principles
  1. Find out how much nitrogen is consumed in plant material by a Canada goose over about a 12-hour period and multiply this number by 100 and add to the total nitrogen in the ecosystem.
  2. Find out how  much nitrogen is  eliminated by a Canada goose over about a 12-hour period and multiply this number by 100 and subtract from the total nitrogen in the ecosystem.
  3. Find out how much nitrogen is consumed and eliminated by a Canada goose over about a 12-hour period and multiply this number by 100; enter this +/-value into the nitrogen budget of the ecosystem.
  4. Do nothing. The Canada geese visitation to the lake would have negligible impact on the nitrogen budget of the pond.
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TLS Online TPP Program

#Question id: 23698

#Unit 13. Methods in Biology

A student wishes to clone a sequence of DNA of ~200 kb. Which vector would be appropriate?
TLS Online TPP Program

#Question id: 4666

#Unit 3. Fundamental Processes

Which one of the following transcription factors binds to TATA box?
TLS Online TPP Program

#Question id: 1753

#Unit 4. Cell Communication and Cell Signaling

In the germinal center, B-cells become memory cells under the influence of:
TLS Online TPP Program

#Question id: 13112

#Unit 2. Cellular Organization

In photorespiration, glycolic acid (glycolate), a two-carbon product of photosynthesis is released from chloroplasts and oxidized into glyoxylate and H2O2 by a peroxisomal enzyme called 
TLS Online TPP Program

#Question id: 29524

#Unit 6. System Physiology – Plant

Phloem feeders activate the