While Studying Gull Egg Laying Abilities a Researcher Noted That

question 39

Multiple Choice

While studying gull egg laying abilities a researcher noted that the birds laid an average of 7 - 9 eggs per clutch at the beginning of the study.After studying the population for 15 generations the researcher noted that the birds now laid an average of 3- 4 eggs per clutch.What type of natural selection is occurring in the population of gulls?

• A)stabilizing
• B)directional
• C)disruptive
• D)There is no selection occurring in this population. Correct

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Definitions:

Fraternal Twins

Twins that develop from two different eggs fertilized by two different sperm, making them genetically as similar as regular siblings.

Viral Theory

A scientific theory that explains the cause of certain diseases as being due to viruses, microorganisms that invade and replicate within living cells, leading to illness.

Prenatal

Pertaining to the period or development before birth; during the pregnancy.

Diathesis-stress

A psychological theory that explains disorder as the result of an interaction between a pre-dispositional vulnerability and stress caused by life experiences.