Search found 6 matches

by AlexB1001
Tue Dec 13, 2011 2:57 pm
Forum: Botany Discussion
Topic: Arabidopsis light stress
Replies: 3
Views: 4924

Re:

1) go to m type in "Arabidopsis anthocyanin" and click on search 3) first two links on your Google search will give you some answer 4) what happens with the energy trapped by photosynthetic pigments if it is not passed to photosynthetic center? 5) look for biosynthesis of anthocyanins Tha...
by AlexB1001
Tue Dec 13, 2011 1:56 pm
Forum: Botany Discussion
Topic: Arabidopsis light stress
Replies: 3
Views: 4924

Arabidopsis light stress

A whole range of questions here: 1) The names of two anthocyanin compounds present in Arabidopsis. 2) Which photoreceptors might control anthocyanin production 3) Three other stress factors that influence anthocyanin synthesis 4) How do anthocyanins protect a plant against high light damage – where ...
by AlexB1001
Sun Oct 31, 2010 10:48 pm
Forum: Evolution
Topic: How can adaptations for manipulation within a lineage exist?
Replies: 7
Views: 9082

Re: How can adaptations for manipulation within a lineage exist?

These species are genetically created for those qualities. They have found their niche with their occurred properties.

I'm sorry, but I just don't think we see eye-to-eye here.
by AlexB1001
Sat Oct 30, 2010 3:31 pm
Forum: Evolution
Topic: How can adaptations for manipulation within a lineage exist?
Replies: 7
Views: 9082

Re: How can adaptations for manipulation within a lineage exist?

Sorry enarees, but what on earth do you mean? Of course there are adaptations within a lineage, I was asking how they could develop! Examples: Some male insects (Damselflies) have 'penis scoops' to remove all the sperm from a previously inseminated female. Some types of Drosophila inject the female ...
by AlexB1001
Fri Oct 29, 2010 12:54 pm
Forum: Evolution
Topic: How can adaptations for manipulation within a lineage exist?
Replies: 7
Views: 9082

How can adaptations for manipulation within a lineage exist?

Nature is not harmonious. Males manipulate females to mate with them, and some possess traits that allow them to force their sperm into the female, or rake out the sperm already inside the female. The same stands for the opposite - females can decide which male's sperm they actually use, digesting o...
by AlexB1001
Fri Oct 29, 2010 12:46 pm
Forum: Zoology Discussion
Topic: A question about sexual selection!
Replies: 4
Views: 10213

A question about sexual selection!

I am quite comfortable with both Fisher's runaway principle and the pre-existing sensory bias hypothesis. The runaway principle states that some males have genes that indicate that they are biologically fit. Some females already have (or develop one through a mutation) a gene that allows her to disc...