SQ3 Transpiration, Translocation and Plant Growth

A desert cactus loses far less water than a corn plant. Which plant adaptation most directly explains this difference?

• Higher rate of photosynthesis

• Thicker cuticle and fewer stomata

• Greater root absorption of nutrients

• Faster rate of transpiration

A plant experiences very high transpiration during a hot and dry day. If the roots cannot absorb enough water, what is the most likely result?

• Increased photosynthesis

• Internal water deficit and reduced growth

• Increased sugar storage in leaves

• Decreased respiration

Which statement best explains why transpiration is considered a "necessary evil" in plants?

• It increases plant respiration but reduces photosynthesis

• It is essential for nutrient transport but may cause excessive water loss

• It reduces plant temperature but stops plant growth

• It prevents water absorption from roots

It is the process where plants lose water vapor through evaporation.

• Transpiration

• Translocation

It refers to the type of transpiration responsible for more than 90% of water loss in plants.

• Stomatal Transpiration

• Cuticular Transpiration

• Lenticular Transpiration

It refers to the loss of liquid water droplets from leaves through hydathodes.

• Guttation

• Transpiration

It is the process in which sucrose is transported from leaves (source) to roots or fruits (sink).

• Translocation

• Transpiration

It refers to the difference between water lost and water absorbed by the plant during drought conditions.

• Internal Water Deficit

• External Water Deficit

A large tropical palm tree can lose hundreds of liters of water per day through transpiration.

• True

• False

High carbon dioxide concentration usually causes stomata to open wider.

• True

• False