8th Grade Science STAAR Review

A eukaryote that makes its own food would be classified as a member of which kingdom?

• Fungi 
• Animalia
• Bacteria
• Plantae

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The main function of the nervous system is to: 

• Support and protect delicate organs such as the brain, lungs, and heart
• Supply oxygen from the lungs to the blood
• Pump oxygen and nutrients through the blood to every part of the body
• Coordinate all actions and reactions of the body

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The function of the respiratory system is to: 

• Convert food into simpler substances for the body to absorb as nutrients
• Supply the blood with oxygen and remove carbon dioxide in the lungs
• Send signals in the form of hormones to the body to control growth, reproduction, and metabolism
• Circulate blood through the body to supply cells with oxygen and nutrients

The body system which filters water and wastes from the blood is the: 

• Excretory system
• Endocrine system
• Digestive system
• Integumentary system

Which is the function of the endocrine system

• to produce offspring
• to separate and eliminate wastes
• to protect the body from disease
• to produce hormones that regulate the body

Which cell structure would carry out the function of photosynthesis?

• Mitochondria
• Chloroplast
• Nucleus
• Vacuole

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Both the cell membrane and the cell wall act to protect the organelles within a cell. Which of the following best describes how the cell wall is different from the cell membrane?

• The cell wall is much thinner and more flexible than the cell membrane
• Cell walls are only found in primitive cells and are never found in plant or animal cells 
• The cell wall is found in plant cells but not animal cells
• The cell wall is found in both plant and animal cells

What will cause plant leaves to wilt?

• The chlorplasts absorb less light energy
• The mitochondria change shape
• The vacuoles shrink
• The cell wall thickens

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Which would result in the most diverse offspring?

• Bees bringing pollen from the flower of one plant to the flower of another
• An orchid with a slower structure that forces self-pollination
• Planting a cutting from a potato to grow a new potato plant
• An amoeba in a fresh water pond reproducing through binary fission

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If an organism reproduces asexually, its offspring will most likely be _____.

• Genetically identical to each other
• Genetically different from each other
• Produced as a result of fertilization
• Produced by specialized cells known as gametes

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