Biology Plant nutrition

What is formed first in a leaf as a result of photosynthesis?

• chlorophyll

• glucose

• starch

• water

From which part of a leaf does most water evaporate during transpiration?

• the cuticle

• the guard cells

• the spongy mesophyll cells

• the xylem vessels

Which substances are transported in the phloem?

• amino acids and starch

• amino acids and sucrose

• protein and starch

• starch and sucrose

Which product of photosynthesis moves out of a green leaf through its stomata?

• carbon dioxide

• glucose

• oxygen

• water

What is carried by the xylem?

• chlorophyll

• mineral ions

• starch

• sugars

Which two substances are the products of photosynthesis?

• carbon dioxide and glucose

• carbon dioxide and water

• oxygen and carbon dioxide

• oxygen and glucose

Which substance, needed for protein synthesis, is carried into a leaf from the stem?

• carbon dioxide

• nitrate

• oxygen

• starch

Which substances are transported in the phloem?

• amino acids and starch

• amino acids and sucrose

• protein and starch

• starch and sucrose

Which process does not release water?

• excretion

• photosynthesis

• respiration

• transpiration

What does a plant make with the nitrates it absorbs?

• carbohydrates

• fats

• mineral salts

• proteins