CCA Crop Growth and Development 2

Question 1

Which plant hormone is primarily responsible for promoting stem elongation and fruit development?

Accepted Answer

Gibberellin

Answer

Abscisic acid

Answer

Cytokinin

Answer

Ethylene

Question 2

The process by which a plant converts light energy into chemical energy is called:

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Transpiration

Answer

Photoperiodism

Question 3

What is the term for the minimum number of days required for a biennial crop to complete its life cycle?

Accepted Answer

Juvenility phase

Answer

Vernalization period

Answer

Photoperiod threshold

Answer

Critical day length

Question 4

Which of the following best describes indeterminate crop growth habit?

Accepted Answer

Plant continues vegetative growth while flowering and fruiting simultaneously

Answer

Plant ceases vegetative growth at flowering

Answer

Plant produces all flowers at a single node

Answer

Plant completes reproduction in one growing season only

Question 5

In corn (maize), the V6 growth stage refers to:

Accepted Answer

Six visible leaf collars

Answer

Six days after germination

Answer

The sixth node below the ear

Answer

Six weeks after planting

Question 6

Root growth is primarily driven by cell division occurring in which zone?

Accepted Answer

Apical meristem

Answer

Zone of maturation

Answer

Zone of elongation

Answer

Root cap

Question 7

Which environmental factor most directly controls the transition from vegetative to reproductive growth in photoperiod-sensitive crops?

Accepted Answer

Night length

Answer

Temperature

Answer

Soil moisture

Answer

CO2 concentration