Search found 198 matches

by plasmodesmata11
Wed May 16, 2012 2:04 am
Forum: Cell Biology
Topic: Why do cells age?
Replies: 22
Views: 24500

Look up telomeres!
by plasmodesmata11
Sun May 13, 2012 3:30 am
Forum: General Discussion
Topic: Bones found under house
Replies: 3
Views: 4332

I am by no means an expert, but I want to say raccoon. Here's a picture: http://img1.etsystatic.com/il_570xN.94217165.jpg
by plasmodesmata11
Wed May 09, 2012 9:43 pm
Forum: Genetics
Topic: autosomes
Replies: 1
Views: 2709

If a sperm is haploid, and an autosome is not an allosome, then how many does that leave?
by plasmodesmata11
Wed May 09, 2012 9:40 pm
Forum: Botany Discussion
Topic: What is responsible for plants' branches having bends?
Replies: 3
Views: 5691

I would say yes, auxin is responsible for that. Furthermore, I would think that most tree trunks are straight because the sun is always moving, and therefore it isn't advantageous for what will later be the trunk to grow in any direction since the sun's location isn't fixed (and it wouldn't receive ...
by plasmodesmata11
Wed May 09, 2012 9:22 pm
Forum: Zoology Discussion
Topic: Female fight
Replies: 7
Views: 9903

I don't think so because as Wallyanna described, they must spend their time and energy on reproduction. A dominant male could copulate with several females, but a female would only copulate once to become pregnant (there are many exceptions to this, but you see my point?), so fighting for more than ...
by plasmodesmata11
Wed May 09, 2012 9:00 pm
Forum: Botany Discussion
Topic: Camellia japonica fungus
Replies: 2
Views: 4403

Re: Camellia japonica fungus

The fungus Glomerella cingulata can infect both azaleas and Camellia japonica. When it infects these plants, it is likely causing canker. It is in the sexual stage when it infects. Here are some general links: m m So to answer your question, if they are reasonably close by, then it seems like a real...
by plasmodesmata11
Sun Jul 31, 2011 5:13 pm
Forum: Human Biology
Topic: Axons generate impulse or transfers information
Replies: 2
Views: 5638

I would say, if you had to pick one (for a test or something?), the structure responsible for transfer of information is the better answer. I say this because there are many interneurons that are responsible for relaying information, whereas nerve endings that actually receive tactile information (c...
by plasmodesmata11
Wed Jul 27, 2011 1:36 am
Forum: Molecular Biology
Topic: DNA 3' end & 5' end
Replies: 6
Views: 16355

Yeah, to add to what Jack said there are several forms of DNA, usually depending on how hydrated they are or what nitrogenous bases they contain. There can be left or right hand helices, the measurements between the bases can be wide or short, etc. There are forms B (biological), A (dehydrated), C (...
by plasmodesmata11
Wed Jul 27, 2011 1:18 am
Forum: Ecology
Topic: Survivorship curve
Replies: 4
Views: 9965

It would be unusual for something to mate only once if it produces few offspring and can do it again. A harsh environment, however, may only allow the organism to reproduce once. A competitive environment may also only allow it to reproduce once. So despite it having the capacity to mate multiple ti...
by plasmodesmata11
Mon Jul 25, 2011 4:28 am
Forum: Ecology
Topic: Survivorship curve
Replies: 4
Views: 9965

Re: Survivorship curve

Not terribly conclusive, but hopefully I can spark an idea... It's close to curve 1 with the difference of that spike. I think that may indicate maturity. Their ability to survive increases as they mature (larger mass etc.). It seems to be a rapid event. After the organism matures sexually, it repro...
by plasmodesmata11
Tue Jul 19, 2011 11:00 pm
Forum: Molecular Biology
Topic: DNA 3' end & 5' end
Replies: 6
Views: 16355

Do you know about phosphodiester linkages? Each nucleotide is bound to the other (in the same chain) by these, and they are between the phosphate groups and terminal hydroxyl groups. The end starting with the phosphate is the 5' end and the terminal hydroxyl end is the 3' end. DNA runs antiparallel....
by plasmodesmata11
Tue Jul 19, 2011 10:50 pm
Forum: Genetics
Topic: Using Colchicine for Polyploids
Replies: 0
Views: 3220

Using Colchicine for Polyploids

So I was wondering... Colchicine is used to create polyploid plants. It acts as a mitotic spindle poison which can cause nondisjunction of the entire genome. What I was wondering was that if you were to treat a seed with a colchicine solution, is the disjunction of the entire genome the usual occure...