Biology Cumulative

Which statement best explains why these cells have structural differences?

• A. The cells have different functions.
• B. The cells evolved in different organisms.
• C. One of the cells develops into the other type of cell.
• D. One of the cells is more primitive than the other cell.

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Life functions are performed at many levels of biological organization. Which level of biological organization is the simplest level at which a structure can support life functions?

• A. cell
• B. tissue
• C. organelle
• D. organ system

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A jackrabbit has large ears containing blood vessels that help it maintain a constant body temperature by adjusting heat exchange with the surrounding environment. Which characteristic of life is best described by this example?

• A. growth
• B. energy use
• C. organization
• D. homeostasis

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All living organisms must maintain homeostasis in order to survive. Which statement best describes one way humans maintain homeostasis?

• A. Temperature is regulated by giving off carbon dioxide.
• B. Water content is regulated by giving off carbon dioxide.
• C. Temperature is regulated by sweating.
• D. Water content is regulated by sweating.

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The shivering mechanism in bumblebees often serves the same purpose as it does in mammals. During which condition will the action of shivering most help a bumblebee to maintain homeostasis?

• A. decrease in available oxygen
• B. low environmental temperature
• C. uncontrolled rise in core temperature
• D. depletion of oxygen in muscle tissues

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Which of the following is essential to proper functioning of all prokaryotic and eukaryotic organisms?

• 
• 
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Which statement best describes a difference between prokaryotic cells and eukaryotic cells?

• A. The presence of both DNA and ribosomes in prokaryotic cells indicates that they are more complex than eukaryotic cells.
• B. The larger size of prokaryotic cells indicates that they are more complex than eukaryotic cells.
• C. The larger size of eukaryotic cells indicates that they are more complex than prokaryotic cells.
• D. The presence of membrane-bound organelles in eukaryotic cells indicates that they are more complex than prokaryotic cells.

Which characteristic is shared by all prokaryotic and eukaryotic organisms?

• A. the ability to reproduce asexually
• B. the ability to make their own food
• C. the need for a source of energy
• D. the need for oxygen for respiration

Which characteristic is shared by both prokaryotes and eukaryotes?

• A. contain genetic material
• B. make their own food
• C. have organ systems
• D. need oxygen gas to breathe

A scientist observes a single-celled organism with several long, whip-like tails. Which function do the whip-like tails most likely perform for the organism?

• A. defense against predators
• B. movement through an environment
• C. detection of the location of a light source
• D. measurement of atmospheric temperature changes

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