Search found 3 matches

by florinka
Fri Jul 01, 2011 9:25 am
Forum: Microbiology
Topic: understand the cause of infection
Replies: 6
Views: 11562

Parasite is an organism that lives inside (endo-) or outside (ectoparasite) some other organism and this relationship is good for the parasite and bad for the host. The difference between a predator and a parasite is that the parasites' host usually doesn't die. So I guess it can be any kind of orga...
by florinka
Fri Jul 01, 2011 9:17 am
Forum: General Discussion
Topic: Are the cells in are body constantly being renewed
Replies: 13
Views: 15777

My opinion: Being alive means to keep the organization of our body on some level. The loss of organisation means we change in not-alive particles by the process of decompositation. And since changing the cells (useless, damaged) is also helping to keep the organization, it is not dieing. It's a way ...
by florinka
Wed Jun 29, 2011 8:27 am
Forum: Cell Biology
Topic: Sex determination in hermaphrodites? plants?
Replies: 2
Views: 4731

ad 1) I think there are more mechanisms for this, but I know only one as far. For example Caenorhabditis elegans - a roundworm (Nematoda) has two differents "sexes": XX - hermafrodite and XO - male. The males are quite rare and they are just a mistake during the segregation of chromosomes ...