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TLS Online TPP Program

#Question id: 13188

The following figure is a model of seedling establishment as a function of distance from a parent tree. Initial seed density measures the number of seeds falling to the ground. Seed survivorship measures the proportion of seeds that survive to the adult stage at each distance


Which of the following factors is most likely to generate the seed survivorship curve shown? 

#Unit 10. Ecological Principles
  1. Seed predation is lowest far from the parent tree.
  2. The best microhabitat for mutualistic seed dispersers is directly under the parent tree.
  3. The best microhabitat for seedling growth is directly under the parent tree.
  4. Many seeds reach the locations where they would have the highest probability of surviving to adulthood.
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TLS Online TPP Program

#Question id: 786

#Unit 1. Molecules and their Interaction Relevant to Biology

A = 27%                    G = 30%   T = 21%              C = 22%

If the genome of a newly isolated virus displays the base composition above, the virus most likely consists of ______.
TLS Online TPP Program

#Question id: 842

#Unit 1. Molecules and their Interaction Relevant to Biology

How the mTOR pathway increases the protein synthesis?
TLS Online TPP Program

#Question id: 15662

#Unit 8. Inheritance Biology

You develop an inbred strain of mice that display one of two distinct syndromes. What evidence might lead you to believe that these mice are mutant for a gene or genes affected by imprinting?
TLS Online TPP Program

#Question id: 3505

#Unit 11. Evolution and Behavior

Patterns of relatedness are different in hymenopterans, which are haplodiploid. Which of the following value of relatedness R1, R2, R3 and R4 respectively in figure?
TLS Online TPP Program

#Question id: 11210

#Unit 7. System Physiology – Animal

An inhibitory postsynaptic potential (IPSP) occurs in a membrane made more permeable to ________.