7th Grade 1st 6 weeks Review

What does this symbol indicate about a chemical?

• It can cause injury to body tissue.

• It catches fire easily.

• It is hazardous to the environment.

• It can be harmful to your lungs.

Which of the following shows the BEST way to heat a test tube over an open flame?

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• 
• 
• 

Which of these is an example of an unsafe practice in a lab?

• testing a substance by tasting it

• watering a plant without wearing gloves

• detecting an odor by moving air toward you with your hand

• pulling your hair back when working with flames

Which of the following represents the correct order for the levels of organization of plants and animals?

• cell → organ → tissue → organism → organ system

• cell → organ system → organ → tissue → organism

• cell → tissue → organism → tissue → organ system

• cell → tissue → organ → organ system → organism

Which of the following graphics represents the hierarchy of living structure?

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• 
• 
• 

What is represented in the diagram?

• tissue

• organ system

• organ

• cell

An animal’s liver is very important. It cleans the blood while also playing a key role in digestion. To which level of biological organization does the liver belong to?

• Organ

• Cell

• Tissue

• Organ system

Living organisms are made up of cells. Cells are organized at different levels to form very complex living organisms like your body. Each level has a specific role or job to perform.

Which of the following lists these levels in the correct order of organization from the simplest to the most complex?

• Cells, tissues, organs, organ systems, organisms

• Organisms, organ systems, organs, tissues, cells

• Tissues, cells, organs, organisms, organ systems

• Organs, organ systems, organisms, cells, tissues

Blood is an odd structure in animals because it is one of the few structures that has functions and is fluid. Blood is mostly made of two types of cells. Red blood cells carry oxygen to all parts of the body. White blood cells protect the body from disease using a variety of methods.

Blood is best classified as a —

• organ

• organ system

• tissue

• organism

What level of organization within a plant is the structure below?

• organ

• organ system

• tissue

• organism