Photosynthesis

During respiration animals take in _____ and release _____. 

• photosynthesis, air

• carbon, oxygen

• oxygen

• oxygen, carbon dioxide

Answer explanation

During respiration, animals take in oxygen from the air and release carbon dioxide as a waste product. This process is essential for energy production in cells.

TRUE or FALSE? All of the carbon in existence on Earth is continually recycled in the carbon cycle.

• True

• False

Answer explanation

True. The carbon cycle is a natural process that continuously recycles carbon among the atmosphere, land, and oceans, ensuring that all carbon on Earth is reused and not lost.

What does NOT produce carbon dioxide?

• Photosynthesis

• Burning Fossil Fuels

• Animal respiration

• Plants decaying

Answer explanation

Photosynthesis is the process by which plants convert carbon dioxide and sunlight into glucose and oxygen, thus it does not produce carbon dioxide. In contrast, burning fossil fuels, animal respiration, and decaying plants all release CO2.

In the carbon cycle, animals can release carbon back into the cycle through __________ or through __________.

• burning . . . photosynthesis

• fixation . . . decomposition

• decomposition . . . photosynthesis

• respiration . . . decomposition

• respiration . . . photosynthesis

Answer explanation

In the carbon cycle, animals release carbon through respiration, which produces carbon dioxide, and through decomposition, where organic matter breaks down, returning carbon to the environment. Thus, the correct answer is respiration . . . decomposition.

Photosynthesis can only occur in organism that has?

• Cell wall

• Chloroplast

• Vacuole

• Epiderm

In the overall photosynthetic reaction, there are two reactants. Which one is used in the Calvin Cycle?

• water

• carbon dioxide

• oxygen

• glucose

What process helps plants make their food?

• Respiration
• Nutrition
• Photosynthesis
• Digestion

What are the raw materials of photosynthesis?

• Glucose & Oxygen
• Glucose & Carbon Dioxide
• Light & Chlorophyll
• Carbon Dioxide & Water

What three things are needed for a plant to do photosynthesis?

• Glucose, Oxygen, Sunlight
• CO₂, Oxygen, Sunlight
• CO₂, Water, Sunlight
• Oxygen, Water, Sunlight

Where can we find many chlorophyll?

• Palisade cell

• Epidermis cell

• Cuticle

• stomata