Search found 123 matches

by SU_reptile
Sat Oct 27, 2007 5:12 pm
Forum: Botany Discussion
Topic: GIS & Remote Sensing in botany
Replies: 1
Views: 2625

GIS & Remote Sensing in botany

Do you have some good electronic articles about applications of RS and GIS in botanical research?
Would appreciate any links
by SU_reptile
Tue Jul 10, 2007 7:58 pm
Forum: Zoology Discussion
Topic: Boa vs python
Replies: 1
Views: 2754

Boa vs python

I have very silly question. What are the MORPHOLOGICAL differences between boas and pythons that allow you to tell them apart explicitly. I know that boa is viviparous, but python is not. However I don't mean that kind of traits. Please help me - I was looking up for such informations in encyclopedi...
by SU_reptile
Sun May 13, 2007 7:46 pm
Forum: Botany Discussion
Topic: Guard Cells and Stomas
Replies: 2
Views: 6128

Guard cells are the two cells that enclose stomatal pore and so comprise the stoma. Their chracteristic structure of cell walls allow them to shift their shape depending on their turgor. They control water flow through the plant but also gas exchange - they allow carbon dioxide to enter the plant an...
by SU_reptile
Fri May 11, 2007 7:28 pm
Forum: General Discussion
Topic: help with the krebs?
Replies: 6
Views: 2237

i'm wondering how the krebs cycle works


What do you mean by working of an metabolic pathway? You want to know the enzymatic processes, subsequent products only, regulation or what?
All cycles and pathways are described very well in L. Streyer's BIOCHEMISTRY. I recommend
by SU_reptile
Fri May 11, 2007 8:04 am
Forum: General Discussion
Topic: Explain what is Electron Transport Chain during respiration?
Replies: 4
Views: 4478

In the TCA cycle there are three reactions that reduce NAD+ to NADH + H+ and one red-ox reaction with FAD giving FADH2. TCA enzymes work in the mitochondrial matrix, hence the dinucleotides produced there enter the ETC, which is abundant in the inner membrane, isn't it? NADH+H+ yields its electrones...
by SU_reptile
Wed May 09, 2007 8:27 pm
Forum: Botany Discussion
Topic: Xylem!!
Replies: 1
Views: 8105

a. In xylem there are two mechanisms: - root pressure - positive pressure - transpiration - negative pressure b. Root pressure is generated by means of active transport of ions and accumulation of them in the root. That in turn decrease the osmotic potential (and so the water potential) in the root ...
by SU_reptile
Wed May 09, 2007 7:45 pm
Forum: Botany Discussion
Topic: AP biology Question
Replies: 1
Views: 1781

Open any book about plant physiology or if you're in school - open your book. The issues of water potential are explained in every book.
by SU_reptile
Wed May 09, 2007 7:41 pm
Forum: Botany Discussion
Topic: plants diversity question
Replies: 1
Views: 1735

Do any effort and open your book or go to a library and find some good book about for example plant physiology - your teacger will appreciate your work
by SU_reptile
Wed May 09, 2007 7:38 pm
Forum: Botany Discussion
Topic: Steles
Replies: 4
Views: 2879

a & b - eustele, c - actinostele as I remember
by SU_reptile
Wed May 09, 2007 7:20 pm
Forum: Botany Discussion
Topic: which can survive better;POLLEN OR SPORES?
Replies: 6
Views: 4219

I think that spores of Adiantum have greater chances of surviving, because they only need a good place for sprouting, while the pollen grain needs a stigma of its spesies' flower. It may have lower chances of coming across one.
That's what I think.
by SU_reptile
Wed May 09, 2007 7:12 pm
Forum: Microbiology
Topic: metal cation vs bacteria
Replies: 5
Views: 4068

Am, sorry, but I don't know what you mean by biofilm. You're looking for some information about an impact of heavy meatl cations on bacterial cells, right?

poorly in english expression

neither am I, don't worry
by SU_reptile
Wed May 09, 2007 3:20 pm
Forum: Botany Discussion
Topic: species-specific pattern of sporoderm
Replies: 0
Views: 1047

species-specific pattern of sporoderm

Could anybody explain to me why the pattern of sporoderm is characteristic for each species or genus, despite pollen grain has genetic material different from the mother sporophyte??