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TLS Online TPP Program

#Question id: 3432

Which of the following statements is (are) true of fixed action patterns?

#Unit 11. Evolution and Behavior

  1. They are highly stereotyped, instinctive behaviors.

  2. They are triggered by sign stimuli in the environment and, once begun, are continued to completion.

  3. An inappropriate stimulus can sometimes trigger them.

  4. All

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TLS Online TPP Program

#Question id: 31163

#Unit 7. System Physiology – Animal

Which of the following condition reduces the size of the action potential?
TLS Online TPP Program

#Question id: 11797

#Unit 6. System Physiology – Plant

A living cytoplasmic connection penetrate the walls between sieve tube elements and their companion cells; which are often complex and branched on the companion cell side, known as
TLS Online TPP Program

#Question id: 3731

#Unit 3. Fundamental Processes

RNA primers are synthesized about once every ________.
TLS Online TPP Program

#Question id: 10209

#Unit 6. System Physiology – Plant

Protection against photodamage is a multilevel process, excited state of chlorophyll is not rapidly quenched by photochemistry it can react with molecular oxygen to form toxic photoproducts such as as singlet oxygen (1 O2*) what can damage if this second line of defense also fails to eliminate the reactive photoproducts?
TLS Online TPP Program

#Question id: 19461

#Unit 13. Methods in Biology

Phase-contrast microscopy is suitable for observing which kind of sample?
1. Single cells 
2. Group of cells
3. Thin cell layers
4. Thick cell layers
Which of the following options is correct?