Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 3247
TLS Online TPP Program

#Question id: 3460

The many eyes hypothesis suggests prey flock because:

#Unit 11. Evolution and Behavior

  1. Predators have difficulty reaching prey in the center of the flock

  2. Bigger flocks make it more likely that one individual will spot a predator

  3. Individuals compete less in a social group

  4. Parasite transmission rates are decreased

More Questions
TLS Online TPP Program

#Question id: 13553

#Unit 6. System Physiology – Plant

According this graph which statements is most appropriate ;


a) The air surrounding the leaf is very still, the layer of unstirred air on the surface of the leaf may be so thick that it is the primary deterrent to water vapor loss from the leaf   
b) The air surrounding the leaf is very still, reduces the thickness of the boundary layer at the leaf surface, reducing the resistance of this layer
c) The moving air reduces the thickness of the boundary layer at the leaf surface, reducing the resistance of this layer    
d) The moving air, the layer of unstirred air on the surface of the leaf may be so thick that it is the primary deterrent to water vapor loss from the leaf
TLS Online TPP Program

#Question id: 10239

#Unit 10. Ecological Principles

Two species of barnacle, balanus balanoides and Chthamalus stellatus, occur in the intertidal regions of Scotland. As following

 Which of the following statements is correct?
TLS Online TPP Program

#Question id: 1513

#Unit 4. Cell Communication and Cell Signaling

The kinase activity of ATM is activated in response to DNA damage due to various stresses (e.g., UV irradiation, heat). Activated ATM then triggers following pathways leading to arrest in G1.

A. Chk2 is phosphorylated and, in turn, phosphorylates Cdc25A, thereby marking it for degradation and blocking its role in CDK2 activation.

B. Phosphorylation of p53 stabilizes it, permitting p53-activated expression of genes encoding proteins that cause arrest in G1, promote apoptosis, or participate in DNA repair.

C. Controlling the pool of p53, ATM phosphorylates MDM2 to inactivate it, causing increased stabilization of p53. Another protein p14ARF inhibits the activity of Mdm2 thus stabilizing p53.

Based on the above information, which one of the following statements is correct?
TLS Online TPP Program

#Question id: 14688

#Unit 13. Methods in Biology

If A and B are two events such that  = 1/ 2 then the events A and B are
TLS Online TPP Program

#Question id: 19893

#Unit 12. Applied Biology

Which one of the following sensors converts the light into an electronic signal?