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TLS Online TPP Program

#Question id: 12018

The amount of energy entering a food chain depends on the

#Unit 10. Ecological Principles
  1. Direction of energy flow in the system
  2. Efficiency of energy recycling in the system
  3. Biomass of carnivores and their efficiency in locating and capturing animal prey
  4. Biomass of autotrophs and their efficiency in transforming solar energy into chemical energy
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TLS Online TPP Program

#Question id: 1496

#Unit 4. Cell Communication and Cell Signaling

Cancers that arise due to mutated tumor suppressor genes require that
TLS Online TPP Program

#Question id: 11747

#Unit 6. System Physiology – Plant

A mechanism for preventing sap loss entails closing sieve plate pores with callose, which is
TLS Online TPP Program

#Question id: 29049

#Unit 10. Ecological Principles

Some given statements about anti freezing are given;
a. some invertebrates to withstand temperatures as low as –18°C without freezing, in presence of glycoproteins
b. Sodium, potassium, or chloride ions involve to increasing  the blood freezing point, so the lack of these ions some species help to lower the blood freezing point
c. Amphibians release large amount of glucose into the blood to prevent freezing of blood in cold
d. Sodium, potassium or urea function as anti freezing in their blood
e. Glycine causes supercooling in plants
Which of the following statements about supercooling/anti freezing is correct?
TLS Online TPP Program

#Question id: 1808

#Unit 4. Cell Communication and Cell Signaling

CD8+ T-cells bearing an αβ TCR:
TLS Online TPP Program

#Question id: 4565

#Unit 11. Evolution and Behavior

Darwinʹs mechanism of natural selection required long time spans in order to modify species. From whom did Darwin get the concept of Earthʹs ancient age?