Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 9961
TLS Online TPP Program

#Question id: 13178

Turnover of water in temperate lakes during the spring and fall is made possible by which of the following? 

#Unit 10. Ecological Principles
  1. Warm, less dense water layered at the top
  2. Cold, more dense water layered at the bottom
  3. A distinct thermocline between less dense warm water and cold, dense water. 
  4. The density of water changes as seasonal temperatures change.
More Questions
TLS Online TPP Program

#Question id: 8288

#Unit 9. Diversity of Life Forms

Some beetles and flies have antler-like structures on their heads, much like male deer. The existence of antlers in beetle, fly, and deer species with strong male-male competition is an example of ________.
TLS Online TPP Program

#Question id: 28826

#Unit 2. Cellular Organization

Which of the following protein is closely related to the ubiquitous Ca2+-binding protein calmodulin ?
TLS Online TPP Program

#Question id: 1201

#Unit 4. Cell Communication and Cell Signaling

Epinephrine binds to the same type of receptors in liver, fat, and smooth muscle cells. Yet in liver, glycogen breaks down; in fat, triacylglycerols break down; and smooth muscle cells relax. How can the same hormone produce three such different responses?
TLS Online TPP Program

#Question id: 15217

#Unit 13. Methods in Biology

Maximum numbers of band achieved in case of 
TLS Online TPP Program

#Question id: 7128

#Unit 5. Developmental Biology

Imagine that in an attempt to get the â-globin gene to be expressed in B-cells, the transcription factors (GATA-1 and GATA-2) known to control the â-globin gene in erythrocytes were introduced into B-cells, yet the â-globin gene was not expressed. What is a likely explanation for this result?