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Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

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Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..

genes controlling growth and development
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Control of Growth & Development tutorials look at how the genetic makeup determines the biological processes on a da..

Homeostatic Mechanisms and Cellular Communication
Homeostatic Mechanisms and Cellular Communication

Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..

Sigmund Freud and Carl Gustav Jung
Sigmund Freud and Carl Gustav Jung

In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..

Chromosomes X and Y and Sex Determination
Chromosomes X and Y and Sex Determination

This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..