Unitary and Modular Organisms: Their Response to Environmental Changes and Perturbation1

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Unitary and Modular Organisms: Their Response to
Environmental Changes and Perturbation1

Casey Jon Vea
Group 3 Section U-2L

August 3, 2011


1A scientific paper submitted in partial fulfillment of the requirements in Biology 150, Principles of Ecology laboratory under Mrs. Charina Grace B. Banaay , Ist semester 2011-2012 Abstract
Every individuals or organisms dwell in a place where well suited for their growth and development, survival and reproduction. When changes happened to their environment expected changes will also be observed and adaptation mechanisms are produced. This study focuses on the responses of modular and solitary organisms under their normal environmental condition and on their disturbed or changed environment. The study further focuses on how long the unitary organisms respond to certain disturbances and how modular organisms respond to lessen the effect of environmental changes happening on their surroundings. Ant’s behavior in three different activities under normal conditions was observed and their response also under disturbed conditions was also observed by inducing commotion to their environment. Moreover, ants were also tested on which food they are most likely be attracted, results showed that they prefer sweeter food sources rather than the salty ones. On the other hand, two sets of modular organisms were subjected to environmental changes, a set for the sun-loving plants (Cyperus and Althernanthera) and shade-tolerant plants (Zebrina and Talinum) were interchangeably exposed to each other’s environment. Results generally showed that when plants are put into an environment where they are not used to, they tend to grow poorly and vice versa. But some developed mechanisms to lessen the impact of the stress applied to them. In conclusion, unitary animals adjust faster than modular organism because they communicate and work with each other but modular organisms have unique ways of adjusting to environmental changes as well.

Ecology was coined by Ernest Haeckel back in 1869. It was derived from two Latin words originally “Oikos” ” which mean house or place to live and “Logos” that means a discussion or study. Literally, ecology means the study of organism “at home” in their native environment. Also, it is the study of the interaction of the organism in its environment.

Every organism, either modular or unitary, has a specific medium or environment where they live and thrive in and which they are continually adapted.
Particular organism’s habitat or the locality that surrounds it is part of its environment. The said habitat has also an abundance of different organisms, plants, plant-like organisms and animals, in which they continually interact ecologically with each other. This habitat sustains life by giving food, shelter and climatic conditions that are finely suitable for its survival, growth and reproduction.

Different conditions contribute different factors on the development of the organism. Climatic factors like Temperature, humidity, wind, rainfall, water and some atmospheric gases are essential on the growth of the organism. These factors contribute by giving resources such as nutrients water source and many others that are essential to their growth and development.

So when one of these climatic factors fails to give its vital role and contribution, the organism needs to adapt rapidly and figure out on how to maintain homeostasis with its environment. Also, organisms also need to encounter the variations happening in nature. Adaptations on other organism have also evolved in response to their harsh environment.

Many organisms have also preferred such conditions that can give exactly what they need in their development. Some plants favor, for example, shady environment where there is less exposure to sunlight. While others, they prefer the full effect of the said environmental factor. This...
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