Plant Physiology Practice Test #2

Which structure regulates gas exchange in leaves?

• Xylem

• Phloem

• Stomata

• Cuticle

Tags

NGSS.MS-LS1-6

Which plant hormone is mainly responsible for fruit ripening?

• Cytokinin

• Ethylene

• Auxin

• Gibberellin

What type of defense is the production of latex in plants?

• Physical

• Behavioral

• Chemical

• Structural

What helps plants detect gravity and orient roots downward?

• Thigmotropism

• Phototropism

• Gravitropism

• Hydrotropism

Which nutrient is critical for ATP and DNA formation in plants?

• Calcium

• Potassium

• Phosphorus

• Magnesium

Guard cells control the opening and closing of:

• Xylem vessels

• Phloem tubes

• Trichomes

• Stomata

Tags

NGSS.HS-LS1-3

What is a major function of magnesium in plants?

• Enzyme activation

• Chlorophyll formation

• Fruit development

• Hormone synthesis

Tags

NGSS.MS-LS1-6

Which part of the leaf protects against water loss?

• Spongy mesophyll

• Cuticle

• Stoma

• Palisade cells

What triggers a plant's hypersensitive response to pathogens?

• Mechanical damage

• Drought stress

• Incompatible pathogen detection

• Nutrient deficiency

Which cells in roots absorb water and minerals?

• Parenchyma

• Xylem

• Root hairs

• Cambium

Tags

NGSS.MS-LS2-1