Dictionary » I » Impact

Impact

Impact

1. Contact or impression by touch; collision; forcible contact; force communicated. The quarrel, by that impact driven. (Southey)

2. (Science: mechanics) The single instantaneous stroke of a body in motion against another either in motion or at rest.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


An Overview of Embryonic Stem Cells

... in the embryo in vivo, but they can be propagated indefinitely in culture in an undifferentiated state. Murine ES cells have had an enormous impact on many fields of research over the last 20 years. Specially, ES cells can be used to reconstitute early mouse embryos, forming the basis of ...

See entire post
by 2444256703
Thu Jan 29, 2015 6:48 am
 
Forum: Cell Biology
Topic: An Overview of Embryonic Stem Cells
Replies: 1
Views: 573

Re: Which has a greater impact of evolution, mutations or genet

Am I correct in stating that, within a population of sexually reproducing organisms, genetic recombination produces more genetic variation compared to mutations and thus is a more important source on of variability on which natural selection operates, whereas in populations of organisms that reprod...

See entire post
by Cat
Fri Oct 31, 2014 2:26 am
 
Forum: Evolution
Topic: Which has a greater impact of evolution, mutations or genet
Replies: 1
Views: 1013

Which has a greater impact of evolution, mutations or genet

I am trying to figure out the answer to this question? There are mixed answers to this question from different sources. Campbell's biology textbook states that mutations are rare and that large genetic variations in a population of organisms that reproduce sexually is due to genetic recombination. H...

See entire post
by alpha78
Sun Oct 19, 2014 2:57 pm
 
Forum: Evolution
Topic: Which has a greater impact of evolution, mutations or genet
Replies: 1
Views: 1013

Can human body hair disappear as a result of... clothing?

... So what will happen to human pelage in future generations? Theory 1) Humankind will probably be hairy until its end, because it doesn't have an impact significant enough to trigger an evolutionary response. Wearing clothes when you already have hair doesn't kill anybody. Theory 2) At one point, ...

See entire post
by jplr
Sat Oct 11, 2014 6:16 pm
 
Forum: Evolution
Topic: Can human body hair disappear as a result of... clothing?
Replies: 4
Views: 1380

Microevolution verus Macroevolution

... in a single event, namely an extinction event in a ring species. If a selection of sub-species in the middle of the ring go extinct, by a bolide impact, for example, and the remaining subspecies are no longer reproductively compatible, then we have an extinction event that is also a speciation ...

See entire post
by hackenslash
Thu Mar 06, 2014 8:57 am
 
Forum: Evolution
Topic: Microevolution verus Macroevolution
Replies: 16
Views: 25924
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 4,615 times. 
What links here | Related changes | Permanent link