Photosynthesis Basics

The heterotroph hypothesis explains

• how life on earth began
• how plants first evolved from heterotrophs
• how heterotrophs went extinct
• how heterotrophs evolved from plants

What is the correct equation for photosynthesis?

• C₆H₁₂O₆ + 6O₂ --> 6CO₂ + 6H₂O
• 6CO₂ + 6O₂ --> C₆H₁₂O₆  + 6H₂O
•  6CO₂ + 6O₂ --> 6H₂O + C₆H₁₂O₆
• 6CO₂ + 6H₂O  -->  6O₂ + C₆H₁₂O₆

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

What do the carbon reactions produce?

• O₂, H₂O, CO₂
• ATP, Glucose, H₂O
• NADPH, ATP, O₂
• Glucose, NADP⁺, ADP + P

Tags

NGSS.HS-LS2-5

What do the light reactions produce?

• ATP, NADPH, O₂
• H₂O, O₂, Glucose
• NADP⁺, ADP + P, O₂
• NADPH, H₂O, ATP

Tags

NGSS.HS-LS1-5

What leaf structure prevents water loss?

• spongy mesophyll
• cuticle
• stoma
• phloem

What tissue contains cells where the majority of photosynthesis takes place?

• spongy mesophyll
• palisade mesophyll
• upper epidermis
• guard cells

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

What can change shape to open and close the stoma?

• guard cells
• xylem
• phloem
• vascular bundle

After sugars are formed in photosynthesis, what structure do they travel through to reach the fruits of the plant?

• xylem
• cuticle
• phloem
• roots

Tags

NGSS.MS-LS1-6

What type of solutions would cause a guard cell to open?

• hypotonic
• hypertonic

Which of the following environmental conditions would cause the stomata to close?

• Low CO₂ level
• Rain
• K⁺ moving into the guard cells
• darkness