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Asexual reproduction is the primary form of reproduction for single-celled organisms such as the archaea, bacteria, and protists. Many plants and [...]
August 23, 2012
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ATP is a multifunctional molecule containing a nucleoside. It is used in cells as a coenzyme. It is often called the “molecular unit of [...]
August 23, 2012
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Cellular respiration is the set of the metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy [...]
August 23, 2012
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A segmented body is a division of an animal’s body plan, whereby the body is divided into functional units. Some plants and animals have [...]
August 23, 2012
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The littoral zone is the part of a sea, lake or river that is close to the shore. In coastal environments the littoral zone extends from the high [...]
August 23, 2012
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Genetic variation within a population occurs regularly within and among populations. It is variations in alleles of genes. Genetic variation is [...]
August 23, 2012
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A hermaphrodite is an organism that has reproductive organs normally associated with both male and female sexes. Some invertebrates groups have [...]
August 23, 2012
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Prokaryotes are a group of organisms whose cells lack cell nucleus mitochondria or any other membrane-bound organelles. Prokaryotes intracellular [...]
August 23, 2012
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Endothermic animals are animals that produce heat in order to control their body temperature. These animals are generally referred to as warm [...]
August 23, 2012
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Radial symmetry is the regular arrangement of body parts around a central axis. When an organism is radially symmetrical, you could cut from one [...]
August 23, 2012