O level biology ecology

When similarly adapted species overlap geographically, closer inspection reveals subtle ecological differences in their habitat or dietary requirements. Nonliving thermodynamic systems also can maintain a limited number of available microsystems.

Academic Units

If it were not thus, then life would not be possible. An enzyme called pectinase digests pectin making it much easier to squeeze the fruit and to make the juice more clear than cloudy. In the definition of life I also introduced the concept of interval.

The glucose has 17 MJoules per kilogram, etc.

O Level Biology Revision

The substrate enters the active site of the enzyme. Then he turned to her and swept her up in his arms.

A small variation in the initial conditions can produce a change in the displacement of the particles, whether that we perceive or not that microscopic oscillation or the law that governs it.

CIE O Level Notes

The biosphere may also be divided into ecozones, which are biogeographical and ecological land classifications, such as Neartic, Neotropic, and Oceanic. The term has several interpretations, and there are many ways to index, measure, characterize, and represent its complex organization.

Habitat shifts provide important evidence of competition in nature where one population changes relative to the habitats that most other individuals of the species occupy.

These relations form sequences in which each individual consumes the preceding one and is consumed by the one following, in what are called food chains or food networks. As soon as he heard it, he leapt into the air with a whoop of joy.

Restoration ecology

Intraspecific relations are those which are established between individuals of the same species, forming a population. This tends to afford them a competitive advantage and discourages similarly adapted species from having an overlapping geographic range.

Ecology is a multi-disciplinary science. Habitat Biodiversity of a coral reef. The biosphere contains great quantities of elements such as carbonnitrogenand oxygen. In making cheese, an enzyme called rennin extracted in enzymes, helps by clotting milk. Starts with green plants 2.

Examples include a swamp, a meadow, and a river. The key could only open only one lock, and the lock could be unlocked by only that key. Global air currents mix the atmosphere and maintain nearly the same balance of elements in areas of intense biological activity and areas of slight biological activity.

These smaller and isolated populations are more vulnerable to extinction. Carthage students then work with the writer to stage it. Disturbance[ edit ] Disturbance is a change in environmental conditions that disrupts O level biology ecology functioning of an ecosystem. Hence, ecologists classify ecosystems hierarchically by analyzing data collected from finer scale units, such as vegetation associations, climate, and soil types, and integrate this information to identify emergent patterns of uniform organization and processes that operate on local to regional, landscapeand chronological scales.

Unanswered questions burned endlessly in her brain; her inner voice was screaming in silent anguish and betrayal as she sank into the shadowed corner of the restroom, holding her head in her hands whilst the tears kept flowing. These relationships between the ecosystems lead to the concept of a biome.

Ecology can, in addition, be sub-divided from the perspective of the studied biomes:. Providing study notes, tips, and practice questions for students preparing for their O level or upper secondary examinations.

You can find notes and exam questions for Additional math, Elementary math, Physics, Biology and Chemistry. Tips and notes for English, General Paper, and. Aug 14,  · ECOLOGY This is the study of inter-relations (interactions) between an organ ism or a group 0of organisms and their environment.

TERMS USED IN ECOLOGY. 1. Habitat: is a place where an organism lives e.g. land habitat is known as terrestrial (mainly forest, deserts and savannahs), water habitat is aquatic (includes fresh water bodies and marine. This website makes use of cookies.

Close. All Notes; Biology. O Level Biology revision material made for all exam boards including CIE. We will have notes, past papers, question banks, videos and much more.

This covers all the topics and modules for all specifications and syllabuses for CIE – (). With an emphasis on human biology, the Cambridge O Level Biology syllabus enables learners to understand the technological world in which they live, and take an informed interest in science and scientific developments.

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