Search found 43 matches

by MIA6
Wed Jun 20, 2007 12:33 am
Forum: Zoology Discussion
Topic: reproduction
Replies: 6
Views: 3330

reproduction

In asexual reproduction, a parent ameba divides into two daughter amebas, so then this parent ameba dies?
thanks.
by MIA6
Wed Jun 20, 2007 12:28 am
Forum: Molecular Biology
Topic: Enzyme
Replies: 12
Views: 5711

Enzyme

When i read about enzyme active site and substrate, it was mentioned something about 'enzyme concentration'? But i don't know what that means. DOes it affect enzyme activities?
thanks for help.
by MIA6
Wed Jun 20, 2007 12:24 am
Forum: Evolution
Topic: Predator
Replies: 3
Views: 2675

Predator

In ecology, predators are usually carnivores, right? Predators must be consumers?
THanks.
by MIA6
Wed Jun 20, 2007 12:21 am
Forum: Molecular Biology
Topic: Blood
Replies: 1
Views: 972

Blood

1. When I learned blood type, my teacher used immune system to explain. For an example, blood type A which is antigen A, then its antibody is anti B. If it is antigen B, then its antibody is anti A. WHY? why if antigen A,then it's antibody B? I don't get it according to the immune system? 2. Genes a...
by MIA6
Mon Jun 04, 2007 11:14 pm
Forum: Ecology
Topic: decomposer
Replies: 7
Views: 23279

decomposer

What’s the difference between decomposer and Scavenger? According to the definitions that i read, they both eat dead organisms? Hope you can tell me, thanks.
by MIA6
Mon May 21, 2007 1:57 am
Forum: General Discussion
Topic: mutation
Replies: 8
Views: 3944

Hi,blcr11, thanks for your explanation. So you mean antibiotics make us develop a resistant strain? but according to Darwin, it's wrong. For an example, a giraffe's neck becomes longer because he has to reach the tree to get food, that's why it becomes longer? I mean that mutation should develop in ...
by MIA6
Sun May 20, 2007 12:10 pm
Forum: General Discussion
Topic: mutation
Replies: 8
Views: 3944

mutation

In my book, it says, Doctor may refuse to give you an antibiotic for a mild illness because he/she may not wish to risk your developing a resistant strain. It sounds more like Lamarck's theory that because your body wants to resist penicillin, then it develops a resistant strain. But Lamarck was wro...
by MIA6
Sun May 20, 2007 12:09 pm
Forum: Ecology
Topic: evolution
Replies: 2
Views: 3106

evolution

1. Does 'interbreed' mean in two different species, they interbreed? or in one species, they interbreed? 2. Does 'inbreed' mean in one species, and in the same family, they inbreed? 3. It is only germ mutations which affect sex cells that are passed on to future generation. What is a 'germ' mutation...
by MIA6
Mon May 07, 2007 10:58 pm
Forum: General Discussion
Topic: cycle
Replies: 1
Views: 2307

cycle

1. What does the level of FSH decrease and remain at a relatively low level during days 15-28 of the cycle? 2. What signals the end of one cycle and the beginning of another? <Does it relate to feedback? I really have no idea about these two questions. > Hope you can give me some hints, so i can thi...
by MIA6
Sun May 06, 2007 8:00 pm
Forum: General Discussion
Topic: Menstrual cycle
Replies: 2
Views: 5163

Menstrual cycle

1. Why isn't blood typing accurate enough to tell, conclusively, if a person actually committed a crime? so What other methods are more accurate? 2. What happens in the ovary and in the blood stream in days 1-14 that bring about a change in uterus? <Does it mean that when no egg is fertilized, in a ...
by MIA6
Tue May 01, 2007 3:08 am
Forum: Genetics
Topic: Inbreeding
Replies: 8
Views: 4474

Inbreeding

Inbreeding may bring together desirable alleles in the homozygous condition. I think inbreeding is like one brother and sister from the same parents have baby together? or inbreeding only refers to animals?because if i was right, then we all know that the baby from a brother and sister will be abnor...
by MIA6
Mon Apr 30, 2007 1:18 am
Forum: Genetics
Topic: RNA
Replies: 2
Views: 1696

RNA

I was confused about the functions of mRNA and tRNA. On my book, it says "At the ribosomes, the genetic code carried by the mRNA will be translated into a sequence of amino acids.","Before amino acids can be joined to make a polypeptide chain, however, they must be transported to the ...