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Stems

stem

The main stem or a branch of the main axial system of a plant, developed from the plumule of the embryo and typically bearing leaves.


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Why's palm stems equally thick all the way?

I've been wondering, why is palm stems equally think all the way from bottom to top when other regular trees are thicker at the base and become smaller further up towards the top? Also, why doesn't palms have tree rings? Regards, Blastula

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by Bastula
Thu Jan 10, 2013 8:30 am
 
Forum: Botany Discussion
Topic: Why's palm stems equally thick all the way?
Replies: 2
Views: 449

Help please

... 2a is asexual reproduction in plants. An example of natural vegetative propagation that involve the stem are buttercups. Runners are horizontal stems that run or grow above ground and from which new plants grow.buds are formed at each node and may give rise to a new plant with its own root system ...

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by Olympic
Wed Aug 01, 2012 7:45 pm
 
Forum: General Discussion
Topic: Help please
Replies: 8
Views: 3615

Vaccine for HIV

... conformational changes making it difficult to block with neutralising antibodies. The ineffectiveness of previously developed vaccines primarily stems from two related factors. First, HIV is highly mutable. Because of the virus' ability to rapidly respond to selective pressures imposed by the ...

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by suzidoc8
Mon Jul 23, 2012 2:47 pm
 
Forum: Microbiology
Topic: Vaccine for HIV
Replies: 1
Views: 3737

Re: Sound and how the brain reacts to it

... want to hear someone doing something that was in any way a 'negative' act as for me that would take away some of the pleasure - I am sure it all stems from being very young and hearing my mum pottering around me doing small chores..amyway - really pleased I am not the onlly one with this, my ...

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by billex
Tue May 08, 2012 10:26 pm
 
Forum: Human Biology
Topic: Sound and how the brain reacts to it
Replies: 81
Views: 77192

Re: What are the potential benefits of epigenetics research?

When you consider that genetic knowledge stems mainly from only about 2% (just some 20,000 or so coding genes) of the genome, a reasonable question to ask is, what’s the other 98% doing. This is in the area of epigenetics. Actually, this is the ...

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by AstraSequi
Wed Mar 28, 2012 7:25 pm
 
Forum: Evolution
Topic: What are the potential benefits of epigenetics research?
Replies: 4
Views: 3078
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