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Describe two pieces of evidence indicating that speciation does not always occur at the same rate.
Some species of moths on the Hawaiian Islands appear to have evolved during the past thousand years, while speciation in other organisms may take millions of years. The fossil record shows that periods of a few thousand years during which lose of species appeared were separated by much longer periods during which there was little speciation.
why obelia shows an intermediate grade of organisation
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What are the processes that autotrophic beings use to produce organic material from inorganic substances? Autotrophic beings make organic material by photosynthesis or by chemo
Name the system that contains three neurons Consider a system that contains three neurons in a culture dish bathed in normal physiological saline. All three neurons are health
Why is it significant that exact copies of DNA are produced during replication? Producing exact copies make sure that when a cell divides, the offspring cells will receive the
in the oneward form
Define the Consequences of Obesity? Obesity has a number of adverse effects and is a risk factor for several problems as highlighted in Figure. It is a risk factor for all caus
What is a phyletic lineage?
The citric acid cycle also called as the TCA cycle (tricarboxylic acid cycle) and the Krebs cycle or the Szent-Györgyi-Krebs cycle is a series of chemical reactions used by all aer
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