Multiple Choice
Which type of survivorship curve is characterized by high survival rates during early and middle life, followed by a rapid decline in survival in later years?
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1. Introduction to Biology
Introduction to Biology
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Which of the following is a circadian rhythm?
A
The molting of a crab
B
The annual shedding of leaves by deciduous trees
C
The human sleep-wake cycle
D
The migration of monarch butterflies
Verified step by step guidance1
Understand the concept of a circadian rhythm: A circadian rhythm is a biological process that follows a roughly 24-hour cycle, responding primarily to light and darkness in an organism's environment. It is regulated by an internal biological clock.
Analyze the options provided: Each option represents a biological process, but only one aligns with the definition of a circadian rhythm.
Option 1: The molting of a crab - This is a developmental process that occurs periodically but is not tied to a 24-hour cycle. It is regulated by growth and environmental factors, not a circadian clock.
Option 2: The annual shedding of leaves by deciduous trees - This is a seasonal process that occurs once a year, influenced by changes in temperature and daylight length, not a daily rhythm.
Option 3: The human sleep-wake cycle - This process follows a 24-hour cycle and is regulated by the circadian clock, making it a circadian rhythm. Option 4: The migration of monarch butterflies - This is a seasonal behavior, not a daily rhythm, so it is not a circadian rhythm.
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