TPO 13-2 Biological Clocks

The word consequently in the passage is closest in meaning to

• Nevertheless

• Moreover

• Additionally

• Therefore

Tags

CCSS.RI.11-12.4

CCSS.RI.8.4

CCSS.RI.9-10.4

CCSS.RL.11-12.4

CCSS.RL.9-10.4

In paragraph 1, the experiment on the fungus Neurospora is mentioned to illustrate

• The existence of weekly periods of activity as well as daily ones

• The finding of evidence that organisms have internal clocks

• The effect of space on the internal clock of organisms

• The isolation of one part of an organism’s cycle for study

Tags

CCSS.RI. 9-10.2

CCSS.RI.11-12.2

CCSS.RI.8.2

CCSS.RL.11-12.2

CCSS.RL.9-10.2

According to paragraph 1, all the following are generally assumed to be true EXCEPT:

• Eukaryotes have internal clocks

• Animals’ daily rhythms are more dependent on external cues than on internal clocks

• The relationship between biological function and environmental cycle is a topic of intense research

• It is important for animals’ daily activities to be coordinated with recurring events in their environment

Tags

CCSS.RI. 9-10.2

CCSS.RI.11-12.2

CCSS.RL.11-12.2

CCSS.RL.8.2

CCSS.RL.9-10.2

The word persistent in the passage is closest in meaning to

• Enduring

• Predicted

• Adjusted

• Strong

Tags

CCSS.RI.11-12.4

CCSS.RI.8.4

CCSS.RI.9-10.4

CCSS.RL.11-12.4

CCSS.RL.9-10.4

Which of the sentences below best expresses the essential information in the highlighted sentence in the passage?

• Stability, a feature of the biological clock’s period, depend on changeable factors such as temperature.

• A major feature of the biological clock is that its period does not change despite significant changes in the environment.

• A factor such as temperature is an important feature in the establishment of the biological clock’s period.

• Biological activity is not strongly affected by changes in temperature.

Tags

CCSS.RI. 9-10.2

CCSS.RI.11-12.2

CCSS.RI.8.2

CCSS.RL.11-12.2

CCSS.RL.9-10.2

According to paragraph 2, which of the following is true about the circadian periods of animals deprived of environmental cues?

• They become longer over time.

• They can vary significantly from day to day

• They are not same for all members of a single species.

• They have the same length as the daily activity cycle of animal that are not deprived of such cues.

Tags

CCSS.RI. 9-10.2

CCSS.RI.11-12.2

CCSS.RL.11-12.2

CCSS.RL.8.2

CCSS.RL.9-10.2

According to paragraph 2, what will an animal experience when its internal rhythms no longer correspond with the daily cycle of the environment?

• Change in period of the internal rhythms

• Increased sensitivity to environmental factors

• Reversal of day and night activity

• Disorientation

Tags

CCSS.RI. 9-10.2

CCSS.RI.11-12.2

CCSS.RL.11-12.2

CCSS.RL.8.2

CCSS.RL.9-10.2

In paragraph 2, the author provides evidence for the role of biological clocks by

• Describing the process of establishing the period of a biological clock

• Listing the daily activities of an animal’s cycle: sleeping, feeding, moving, reproducing, metabolizing, and producing enzymes and hormones

• Contrasting animals whose daily schedules fluctuate with those of animals whose schedules are constant

• Presenting cases in which an animal’s daily schedule remained stable despite lack of environmental cues

Tags

CCSS.RI.11-12.5

CCSS.RI.6.5

CCSS.RI.7.5

CCSS.RI.8.5

CCSS.RI.9-10.5

The word duration in the passage is closest in meaning to

• Repetition

• Length

• Feature

• Process

Tags

CCSS.RI.11-12.4

CCSS.RI.8.4

CCSS.RI.9-10.4

CCSS.RL.11-12.4

CCSS.RL.9-10.4

In paragraph 2, why does the author mention that the period for different horseshoe crabs ranges from 22.2 to 25.5 hours?

• To illustrate that an animal’s internal clock seldom has a 24-hour cycle

• To argue that different horseshoe crabs will shift from daytime to nighttime vision at different times

• To illustrate the approximate range of the circadian rhythm of all animals

• To support the idea that external cues are the only factor affecting an animal’s periodic behavior