Growth Patterns

Growth Patterns

Cicada shedding its old shell for a new growth

When measuring growth, it is more desirable to use dry mass as a reliable indication. However, since you can’t just ‘suck’ an organism dry, we tend to measure growth as an increase in height or ‘fresh’ weight.

The following indicates various growth curves for the corresponding organisms.

Sigmoid Growth Curve

The sigmoid curve is a ‘growth average’ representing all organisms, where young organisms experience rapid accelerating growth to cope with their environment, followed by a continuous steady growth. Towards maturity, an organism’s growth rate slows down until no growth occurs.

Annual Plant Growth

Annual plants only live for one year. At first, the embryo of the seed harnesses the seed food supply and is illustrated by a decrease in growth to begin with as the food supplies shrink. Once this energy kicks in, and photosynthesis can occur in the plant, growth begins to accelerate. Throughout the year the plant will continue to grow, and when it has reached the Winter months, and seeds have been dispersed, it withers and dies, illustrated by the decrease in mass.

Tree Growth

Perennials such as trees continue to grow year after year, and in the instance of trees, can grow for an immense space of time. Most growth occurs in Spring.

Human Growth

Humans have two phases of growth ‘spurts’, one in infancy and one in adolescence. In between infancy and adolescence, there is a period of steady growth while adulthood is when growth halts.

Insect Growth

Insects possess exoskeletons (an exterior skeleton) which means continuous growth cannot occur without this skeleton allowing so. In light of this, the insects must shed their outer layer for growth to continue. This molting of the skin allows body mass to increase.

 

 

Credit: Stephanie Castle

Quiz

Write the letter of your answer in the space provided. Select from the box below.

A. Sigmoid Growth Curve
B. Annual Plant Growth
C. Tree Growth
D. Human Growth
E. Insect Growth
1. Insects shed exoskeleton to allow body mass to increase.
2. A ‘growth average’, where young organisms experience rapid accelerating growth to cope with their environment followed by a continuous steady growth.
3. Two growth spurts, one in infancy and another in adolescence.
4. For some plants, the lifespan is only about a year and in this lifespan, they continuously grow until they wither during Winter months.
5. Some trees form annual rings as they continue to grow year after year.

Send Your Results (Optional)

Your Name
To Email

You will also like...

Genetic engineering
Genetic Engineering Advantages & Disadvantages

This tutorial presents the benefits and the possible adverse eventualities of genetic engineering. Know more about this ..

Lights' Effect on Growth
Lights’ Effect on Growth

This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

Biological Energy
ATP & ADP – Biological Energy

ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

Golgi apparatus (3-D illustration)
Role of Golgi Apparatus & Endoplasmic Reticulum in Protein Synthesis

The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..

Origins of Life on Earth
Origins of Life on Earth

Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..

Birth of a Human Baby
Birth of a Human Baby

Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..