16.3.2 Growth Curves (T/F)

The sigmoid growth curve consists of four main phases: lag phase, exponential phase, maturity phase, and senescence phase.

Annual plants complete their life cycle in more than two years.

Biennial plants undergo only vegetative growth throughout their life cycle.

Perennial plants reproduce only once in their lifetime.

During the lag phase of growth, plant cells actively divide at a high rate.

The exponential phase is characterized by rapid cell division and elongation.

The maturity phase is when the plant reaches its full size and the growth rate slows down.

Senescence is the phase where plant cells become more active and increase their metabolic rate.

Water and nutrients are essential factors that influence plant growth.

Temperature has no effect on plant growth and development.

The sigmoid growth curve applies only to animals and not to plants.

External stimuli such as sound waves can influence plant growth.

Light is not a significant factor in plant growth since plants obtain energy from the soil.

The presence of pests and pathogens has no impact on plant growth.

Auxins and gibberellins are plant hormones that play a role in growth and development.

The presence of chlorophyll is necessary for plant growth as it allows photosynthesis to occur.

Biennial plants reproduce every year.

All plants follow a linear growth pattern throughout their lifespan.

Plants with a short lifespan, such as radishes and wheat, are considered annuals.

Maturity phase is when plants stop growing completely.