Search found 17 matches

by cyanodave
Fri Mar 30, 2012 6:40 pm
Forum: Molecular Biology
Topic: Life
Replies: 17
Views: 13479

Re:

i have no knowledge about the mtDNA.can anyone tell me about the mtdna. in endosymbiotic theory it is hypothesized mitochondria did not evolve inside eukaryotic cells but were consumed and incorporated into the cellular mechanics of the eukaryote, this is why they have their own DNA, because they w...
by cyanodave
Fri Mar 30, 2012 6:37 pm
Forum: Molecular Biology
Topic: Life
Replies: 17
Views: 13479

I believe what you are referring to as 'life' is a perception of the world around you, or a consciousness. It is hard to say that life 'begins' at any set point in fetal development, as stated above, all the cells which contribute to the fetus and resulting person spawned from an original set of liv...
by cyanodave
Fri Mar 30, 2012 1:06 am
Forum: Zoology Discussion
Topic: Maximum Life Span of Animals, Fishes and Birds.
Replies: 9
Views: 14137

the reasons why our life spans are the way they are may differ, but the reason they are at these set levels is often a result of reproductive capabilities. Animals with few predators such as tortoises or animals on secluded islands with few or no predators such as new zealand's tuatara generally hav...
by cyanodave
Fri Mar 30, 2012 12:33 am
Forum: Zoology Discussion
Topic: Green mammals
Replies: 12
Views: 30991

One solution may be the size of arboreal mammals, large and even smaller monkeys are not often hunted from above the trees, but from the ground, and when they are in trees they cling to branches for support, not leaves as arthropods might. This might also explain why smaller arboreal mammals, even t...
by cyanodave
Fri Mar 30, 2012 12:20 am
Forum: Cell Biology
Topic: Thalidomide
Replies: 5
Views: 12224

If it is the difference of life and death, and there is little or no chance of doing harm to a fetus there is absolutely no reason to not take the drug. We should not be held back from substances that might save our lives because of events of the past.
by cyanodave
Fri Mar 30, 2012 12:09 am
Forum: Cell Biology
Topic: Help with a question
Replies: 7
Views: 7622

Correct me if I'm wrong, but don't the chromosomes attach to the poles of the cell via microtubules during metaphase, and are pulled by the microtubules to the poles during anaphase? if this is the case then an inhibitor would prevent the occurrence of anaphase because chromosomes would remain in th...
by cyanodave
Fri Mar 30, 2012 12:01 am
Forum: Microbiology
Topic: How do you tell if transformations occurred in data?
Replies: 1
Views: 1346

if you look at the original cell's DNA and the Transformed cell's DNA you can tell there is a difference, It's obvious it has been altered from its original form, and if you look at the bands and compare them from the vector+new gene across to the bands for the transformed call's DNA, the latter con...
by cyanodave
Thu Mar 29, 2012 11:34 pm
Forum: Ecology
Topic: Herbivores without predators
Replies: 19
Views: 27381

Re:

reference please apologies this is actually known as the bottleneck effect, according to the 6th edition Campbell Reece biology textbook. - "disasters such as... droughts" (or rather the resulting famine caused by a drought or similar occurrence such as overconsumption of a food source) &...
by cyanodave
Thu Mar 29, 2012 11:20 pm
Forum: Cell Biology
Topic: Topoisomerase DNA Replication :D
Replies: 2
Views: 4014

the okizaki fragment follows the Helicase protein on the lagging strand, and is defined as the fragment between the ligase and helicase proteins
by cyanodave
Thu Mar 29, 2012 11:17 pm
Forum: Microbiology
Topic: Molecules that cause pigmentation
Replies: 3
Views: 6571

almost all bacteria and fungi that are exposed to the sun must produce some kind of colored or opaque protein to protect it's organelles from UV light, it might be that these pigments have no other functions in the organisms you listen than protection from the sun.
by cyanodave
Tue Mar 27, 2012 4:10 am
Forum: Botany Discussion
Topic: Phosphate bioavailability in soil
Replies: 9
Views: 9751

I have worked on an organic farm for several years and have found the cheapest way to acidify your soil would be going to the store and getting a bag of sulfur and distributing it through your soil. This might not sound 'green' but it is indeed organic and lowers pH effectively.
by cyanodave
Tue Mar 27, 2012 4:04 am
Forum: Ecology
Topic: Herbivores without predators
Replies: 19
Views: 27381

Re: Genetic Instability

Help me on this - how does starvation lead de facto to genetic instability and what do you mean be "genetic instability"? When the numbers of a populations are diminished severely the gene pool is narrowed, this is like pruning a tree to the point where it has a single branch, as the spec...