Directs

... "When the homologous chromosomes pair together..." it is because there is 'something' in the DNA sequences of the 2 chromosomes that directs (your word)/propels/draws/attracts the two (homologous) chromosomes (each with their 2 chromatids) towards one-another? Do we know what it is? ...

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... that natural selection creates the fit. Variation is ubiquitous and random in direction. It supplies the raw material only. Natural selection directs the course of evolutionary change." So back to my assertion that microevolution is a fairytale: In order for microevolution to occur, what ...

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there is a gene that directs the production of an enzyme that makes growth hormone. It is growth hormone that directs both your hight and the length of arms and legs.

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... population somewhere. It might be useful to think about how directed evolution works (it is what got Darwin thinking about how the environment directs breeding) - how do you get poodles? Are all poodles living today descended from a single poodle couple? They certainly have a small group of ...

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Good question My guess is they will grow in whatever direction they happen to begin growing unless they hit an obstacle(and ethylene directs the plant going round it) or there is a unidirectional source of light(case in which phototropism takes over: the stem grows towards the light and ...

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