CCA Crop Growth and Development 3

Question 1

Vernalization is the process by which flowering is promoted by:

Accepted Answer

Extended exposure to low temperatures

Answer

Vernalization requires a prolonged period of cold temperatures to satisfy the plant's requirement before it can flower.

Question 2

The R1 growth stage in soybeans is characterized by:

Accepted Answer

Beginning bloom (one open flower at any node)

Answer

R1 in soybeans marks the beginning bloom stage when one open flower is visible at any node on the main stem.

Question 3

What is the primary role of the endosperm in a seed?

Accepted Answer

Provides nutrients to support embryo germination and early seedling growth

Answer

The endosperm is a nutrient storage tissue that supplies energy and nutrients to the embryo during germination.

Question 4

Apical dominance in plants is maintained primarily by which hormone?

Accepted Answer

Auxin (IAA)

Answer

Auxin produced by the apical bud suppresses lateral bud growth, a phenomenon known as apical dominance.

Question 5

Which of the following crops is classified as a C4 plant with higher photosynthetic efficiency under hot, dry conditions?

Accepted Answer

Corn (maize)

Answer

Corn is a C4 plant that uses a more efficient carbon fixation pathway, giving it a competitive advantage in hot, sunny, and water-limited environments.

(CCA) Certified Crop Advisor Practice Test

(CCA) Certified Crop Advisor Practice Test

CCA Crop Growth and Development 3