Levels of Organization

The human body is composed of organ systems. Which list represents a system organized from least to most complex?

• Heart > cardiac muscle > muscle tissue > muscle cell

• Lung tissue > trachea > nostrils > circulatory system

• Muscle cell > muscle tissue > biceps muscle > muscular system

• Integumentary system > skin cell > hair > sweat glands

The diagrams show some of the levels of biological organization. In what order are the levels in the diagram?

• Population > community > ecosystem

• Organism > community > population

• Organism > population > community

• Ecosystem > population > community

Recent studies in bone research indicate that using ultrasound on a broken bone can decrease the healing time by 25%. Which of these are the most basic levels of organization involved when a bone heals?

• Cells and tissue

• Cells and organ system

• Organ system and organism

• Tissue and organ system

The table shows some observations made by four students during a field trip to a nature area. Which student made observations of a community of organisms?

• Student 1

• Student 2

• Student 3

• Student 4

A science class is planning a field trip to a local farm that has a large pond. Which of the following lists the order of biological organization from smallest to largest that the students can expect to find at the pond?

• Organism, community, population, ecosystem

• Organism, population, community, ecosystem

• Population, organism, community, ecosystem

• Population, organism, ecosystem, community

Which of the following functions at the same organizational level as a kidney in the human excretory system?

• Skeleton

• Epithelial tissue

• Urinary bladder

• A squamous cell

A student is studying the ecology of a playa lake, which forms after a rainfall in a dry lake bed. The table lists the organisms that the student observed. Which level of biological organization has the student described in the table?

• Biosphere

• Organelle

• Ecosystem

• Community