ODWS icon

The Open Door Web Site
HOMEPAGE CHEMISTRY PHYSICS ELECTRONICS HISTORY HISTORY OF SCI & TECH MATH STUDIES LEARNING FRENCH STUDY GUIDE  PHOTO GALLERY
BIOLOGY HOMEPAGE  IB BIOLOGY WEB TOPIC CHAPTERS FACTS & FIGURES LABORATORY WORK QUESTIONS & QUIZZES ECOLOGY CLUB PLAYS

 

Reference chapter

Question 3
HTML version
PDF version

 

 

 

 

EMITTERS AND RECEPTORS

Custom Search

Question 3

The ethologist, Niko Tinbergen, studied the way adult gulls feed their young. The adult eats its food at sea. When the adult returns to its nest, the chick taps the side of the adult's beak. This tapping action causes the adult gull to open its mouth. The chick then places its head into its parent's mouth and the adult regurgitates some of its food for the chick to eat.

The beak of an adult gull is shown in the image below.

 

Seagull

 

Tinbergen used different models to represent the beak of an adult gull. He showed each one in turn to a young gull chick to see if the tapping reaction occurred. The diagrams below show six of the models which Tinbergen used in his experiment.

 

beaks

 

The results of this experiment are shown in the table

 

Response

Models

Tapping response

B C E

No response

A D F

 

Answer the following questions

 

(a) What does the word regurgitate mean?

(b) Name two other types of bird which feed their chicks by regurgitating food.

(c) From the results of this experiment, what do you think is the stimulus which causes the chick to tap on the adult gull's beak? Give a reason for your answer.

(d) Does the shape of the beak have any influence on the chick's tapping reaction? Give a reason for your answer.

(e) How would you carry out an experiment to find out if the chick will tap beaks which have spots of other colours, such as red, blue and yellow? (You can use diagrams to help you answer this question).

 

The Open Door Web Site is non-profit making. Your donations help towards the cost of maintaining this free service on-line.

Donate to the Open Door Web Site using PayPal

SITE MAP
WHAT'S NEW?
ABOUT

PRIVACY

COPYRIGHT

SPONSORSHIP

DONATIONS

ADVERTISING

© The Open Door Team 2017
Any questions or problems regarding this site should be addressed to the webmaster

© Paul Billiet and Shirley Burchill 2017

Hosted By
Web Hosting by HostCentric


SiteLock