Life Science

What is the primary function of guard cells in plant leaves?

• To store water and regulate the opening of pores

• To transport water throughout the plant

• To provide structural support to the plant

• To perform photosynthesis

Which of the following best describes a tissue in multicellular organisms?

• A group of similar cells organized to perform a specific function

• A single cell that performs all life processes

• A collection of different organs working together

• A system of organs that perform body functions

How do multicellular organisms differ from unicellular organisms in terms of organization?

• Multicellular organisms have more than one level of organization

• Unicellular organisms have specialized cells

• Multicellular organisms perform all functions in a single cell

• Unicellular organisms have multiple subsystems

Evaluate the role of the shoot system in plants.

• It absorbs energy from the sun for photosynthesis

• It anchors the plant in place

• It transports water and nutrients from the soil

• It protects the plant from insects

What is the main function of the root system in plants?

• To get nutrients and water from the soil

• To absorb sunlight for photosynthesis

• To transport water throughout the plant

• To protect the plant from harsh weather

Understanding the levels of organization, which of the following is the correct order from simplest to most complex?

• Cells, tissues, organs, organ systems

• Organs, tissues, cells, organ systems

• Organ systems, organs, tissues, cells

• Tissues, cells, organ systems, organs

Which of the following best explains why different cell shapes are important in living organisms?

• A) To make organisms look more interesting

• B) To help cells perform specific functions more effectively

• C) To ensure all cells are exactly the same size

• D) To prevent cells from moving around

Look at the photo of the clematis. Record your observations about the structures of each organ as it relates to its function.

Stem: transports nutrients and stores water, supports plant

Leaf: captures sunlight for making nutrients, regulates water loss

Flower: attracts animal pollinators

Word Bank: Long and thin, Flat and Green, Bright color located at top of plant.

Use this image of a water lily as evidence to support the claim that organs work together to form organ systems that perform necessary functions. Choose all that apply.

•   The cell is the basic unit of all living things

• A system of interacting cells makes up a tissue.

• A system of interacting tissues makes up an organ. A system of interacting organs makes up an organ system.

• Organ systems interact to perform life functions for the organism. Therefore, interacting body systems in an organism are made of cells

Guard cells are narrow when water is unavailable. Why might this be important

• A. The narrow guard cells take up less space so there is more room in the leaf for water.

  
  

• B. The narrow guard cells help the pore take in more nutrients from the air.

  
  

• C. The narrow guard cells keep the pore closed so water cannot exit the cell.

  
  

• D. The narrow guard cells are able to get more energy from the sun.

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