Agronomy Crop Physiology 2

Question 1

What is the water potential of pure water at standard conditions?

Accepted Answer

0 MPa

Answer

-1 MPa

Answer

+1 MPa

Answer

0.5 MPa

Question 2

Which photosynthetic adaptation allows cacti and pineapples to open their stomata at night to fix CO2?

Accepted Answer

CAM photosynthesis

Answer

C3 photosynthesis

Answer

Photorespiration

Answer

C4 photosynthesis

Question 3

What is vernalization in crop production?

Accepted Answer

A period of cold temperature exposure required to induce flowering

Answer

Application of fertilizers in early spring

Answer

The process of seed germination under warm temperatures

Answer

Treatment of seeds with hormones to break dormancy

Question 4

What is the primary function of xylem tissue in crop plants?

Accepted Answer

Transport of water and minerals from roots to shoots

Answer

Transport of sugars from leaves to roots

Answer

Storage of starch reserves

Answer

Gas exchange in leaves

Question 5

Which plant hormone promotes seed germination, stem elongation, and is applied commercially to increase grape berry size?

Accepted Answer

Gibberellin

Answer

Ethylene

Answer

Abscisic acid

Answer

Cytokinin

Question 6

What term describes the transport of photosynthates (sugars) through the phloem from leaves to roots or fruits?

Accepted Answer

Translocation

Answer

Cohesion-tension

Answer

Osmosis

Answer

Transpiration

Question 7

Which mineral nutrient is essential for chlorophyll synthesis and is found at the center of the chlorophyll molecule?

Accepted Answer

Magnesium

Answer

Calcium

Answer

Potassium

Answer

Iron