Search found 7 matches

by chicken_boy
Sat Aug 05, 2006 12:55 am
Forum: Human Biology
Topic: fat
Replies: 10
Views: 3399

fat

is fat actually generated somewhere within the body or does it just accumulate when too much is consumed? i know that the reason for fat in the body (or at least one reason) is because it stores more calories than other substances (9 cal./g, as opposed to 4 cal./g in carbohydrates and such), but is ...
by chicken_boy
Sat Aug 05, 2006 12:51 am
Forum: Microbiology
Topic: Viruses
Replies: 26
Views: 14219

For one thing, they differ greatly in size. The biggest viruses are only as large as the tiniest bacteria. A typical bacterium has a rigid cell wall and a thin, rubbery cell membrane surrounding the fluid, or cytoplasm inside the cell where as a virus may or may not have an outermost spiky layer cal...
by chicken_boy
Mon Jul 31, 2006 10:16 am
Forum: Molecular Biology
Topic: altering DNA
Replies: 1
Views: 1143

altering DNA

Something I've always wondered about, I know certain viruses can alter DNA of surrounding cells and also alter themselves through mutation. The question is will we ever be able to alter DNA to the point where we could change things like hair color, or perhaps correct certain genetic related predispo...
by chicken_boy
Tue Jul 25, 2006 7:16 am
Forum: Evolution
Topic: speciation
Replies: 1
Views: 1842

speciation

Just wondering. Is there a set level of genetic variation between two close species, wherein they can no longer interbreed and produce fertile offspring? Perhaps a certain percentage of their genetic code? Does a higher gene count allow for more variation, before true speciation occurs?
by chicken_boy
Tue Jul 25, 2006 4:21 am
Forum: Genetics
Topic: Mutation with magnetic field reversals
Replies: 1
Views: 2024

Mutation with magnetic field reversals

Would the incidence of mutations increase substantially during times of magnetic pole shifts? The unstable Van Allen belts then might allow more radiation to reach the Earth, causing periods of accelerated genetic evolution. Likewise, do magnetic field reversals correspond to times of speciation, or...
by chicken_boy
Tue Jul 25, 2006 4:13 am
Forum: Microbiology
Topic: Evolution tests with bacteria
Replies: 3
Views: 2873

Evolution tests with bacteria

Because Bacteria evolve far faster than humans, bacteria would be ideal for testing evolution. If you isolate one bacteria population from another after a while they should evolve into different species, right? Actually, I have heard this test has already been carried out but is this true? If so, ho...