Plant Science Praticum

What percentage of fresh weight in green plants is made up of water?

• 50-60%

• 60-70%

• 70-90%

• 80-100%

What is the primary role of water in plants?

• To provide nutrients

• To facilitate biochemical reactions

• To maintain temperature

• To support the plant structure

Which process allows plants to cool their leaves?

• Photosynthesis

• Transpiration

• Respiration

• Dormancy

What is the effect of inadequate water on plants?

• Enhanced growth

• Increased disease and insect attacks

• Improved photosynthesis

• Better nutrient absorption

Which elements are most often needed for plant growth?

• Calcium, magnesium, sulfur

• Nitrogen, phosphorus, potassium

• Iron, manganese, zinc

• Copper, boron, molybdenum

What is the primary effect of low temperatures on plants?

• Increased metabolic processes

• Enhanced growth

• Slowdown of metabolic processes

• Improved nutrient absorption

What can happen to plants adapted to cold areas when exposed to rapid drops in temperature?

• They grow faster

• They show signs of damage

• They become more resistant

• They produce more flowers

What is the primary function of leaves in photosynthesis?

• Absorb water

• Manufacture sugar

• Support the plant

• Protect from insects

What is the role of the cambium in a tree?

• Protects tree from injuries

• Carries food made in the leaves

• Forms annual rings of new wood

• Provides strength

Which part of the tree carries sap from roots to leaves?

• Inner bark

• Outer bark

• Sapwood

• Heartwood