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Natural selection can therefore mean differential reproduction among members of the sarne gene pool. We earlier said that selection would promote those alleles that give rise to phenotypes that are better adapted to a given environment. In other words, the frequencies of 'such alleles would tend to increase and those of ill-adapted ones would tend to decrease. What we are sayingis that natural selection is a matter of changes in gene frequencies. Differential reproduction has a dual role to perform. One it leads to or maintains adaptations and therefore determines whether individuals of a population or species will survive; and two, it is a process which determines what changes will occur in the frequencies of alleles in a gene pool of sexually reproducing individuals.
Types of Osmotic Exchanges The osmotic exchanges that take place between an animal and its environment are of two different types: Obligatory exchanges and Regulated
Q. What are some functions of the epithelium? The epithelial tissues can perform protection, covering and impermeability against the environment, for instance, in the skin, res
Explain the relationship between an agonist muscle and its antagonist as it relates to positional control, functional movement and neuromuscular activation. For example, how the tw
In fact a real earthquake ground motion at a particular site is much more complicated that than the simple waveform depicted. It would be beneficial if we make comparison between t
AMITOSIS This is direct cell division in which the genetic material is not duplicated and hence its distribution to the daughter cells is not precisely half and half,
What is Carbon Cycle explain briefly? Life on earth is mainly carbon-based. Most of the material substances that make up living organisms consist of organic compounds of carbon
Q What is the way of life of sponges? Sponges live exclusively in an aquatic environment and they are attached by their base to a substrate fixation ground. Sponges are filteri
How life exist in earth?
Body Musculature - Locomotion The layout of the muscle layers surrounding the coelom is necessarily the same in all the major classes of Annelida. The body wall has a layer of
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