Researchers Have Tested Lack's Hypothesis on Clutch Sizes,and the Results

question 4

Multiple Choice

Researchers have tested Lack's hypothesis on clutch sizes,and the results are shown in the accompanying figure.In this graph,the histogram shows actual clutch sizes over 22 years for the Great Tit (Parus major) ,whereas the individual data points reflect results of manipulation of clutch size.According to this data,________.

• A) Lack's hypothesis is supported
• B) there is an ideal clutch size in terms of survival; however, this species of bird is not producing as many offspring as could survive, therefore Lack's hypothesis is not supported
• C) there is an ideal clutch size in terms of survival-which is more than the number of offspring that are being produced; however, the results still support Lack's hypothesis
• D) there is no apparent ideal clutch size because of discrepancies in these data

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Definitions:

Behavioral Response

The observable reaction or action of an individual following an environmental or internal stimulus.

Leptin

A hormone produced by adipose cells that helps to regulate energy balance by inhibiting hunger, which in turn diminishes fat storage in adipocytes.

Genetics

The branch of biology that studies the inheritance of physical and behavioral characteristics of an organism as determined by the genes.

Moderate Activity

Moderate Activity refers to physical exercises or movements that raise the heart rate to a level that is not too low nor too high, contributing to cardiovascular health and fitness without excessive stress.