AP BIOLOGY

Detailed explanation-1: -Double sigmoid growth curve of the fig showing the progression in fruit diameter and ethylene evolution during the three phases of fruit growth. I-III indicates the three phases of fruit growth and development.

Detailed explanation-2: -Pear, peach, and strawberry fruits are Rosaceae species that have relatively close genetic backgrounds. However, pear fruits exhibit a single sigmoid pattern, while peach and strawberry fruits exhibit a double sigmoid pattern (Fig.

Detailed explanation-3: -D. Logistic growth model is represented by a sigmoid curve.

Detailed explanation-4: -An S-shaped or sigmoid curve is obtained upon plotting the total growth of a plant against a particular time interval. It consists of 4 phases-lag phase, log or exponential phase, stationary phase (steady growth phase in organs or organisms exhibiting indefinite growth) and diminishing growth phase or decline phase.