Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

A _______ is a chemical that conveys information between individuals of the same species.

  1. a. pheromone
  2. b. neurotransmitter
  3. c. hormone
  4. d. all of the above

Summary Introduction

Concept introduction: The information transmission is done through communication signals. These signals persist if the response benefits the sender and the receiver. If the sender or receiver failed to send the signals, then any one of the individuals will be affected.


Reasons for the correct statement:

Communication signals are mostly chemical signals called pheromones. This transmits information among the species. These signals cause shift in the receiver’s behavior and also cause longer-term responses.

Option a. is given as “pheromone”. This is a kind of chemical signal that conveys information to the members of the same species. There are two types of pheromones. Signal pheromones are used during reproduction. Alarm pheromones usually occur during the threat or risk from the predator. Hence, option a. is the correct answer.

Reasons for the incorrect statement:

Option b. is given as “neurotransmitter”; this is also a kind of endogenous chemical signal that transmits the information from neuron to neuron within an individual not between the species...

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