Search found 43 matches

by MIA6
Thu Oct 05, 2006 3:08 am
Forum: General Discussion
Topic: microscope
Replies: 1
Views: 1871

microscope

1. In a microscope, what's the Uses of Coarse-focus knob and Fine-focus knob? I think theses two knobs have different uses? 2. The resolving power of an optical system is its ability to distinguish clearly and in detail between two points which lie very close to each other. I don't understand what '...
by MIA6
Mon Oct 02, 2006 3:09 am
Forum: Evolution
Topic: Cells
Replies: 21
Views: 14875

Cells

1. My biology teacher told us that species is a group of organisms that ARE ABLE to interbreed with each other. Does it mean like if cats want to be in the 'species' category, they must be able to have offspring with other animals,like dogs??? But i found in the dictionary, it says: composed of rela...
by MIA6
Mon Oct 02, 2006 3:05 am
Forum: General Discussion
Topic: Species
Replies: 3
Views: 3326

Species

1. My biology teacher told us that species is a group of organisms that are able to interbreed with each other. It means like if cats want to be in the 'species' category, they must be able to have offspring with other animals,like dogs??? But i found in the dictionary, it says: composed of related ...
by MIA6
Mon Sep 25, 2006 11:32 pm
Forum: General Discussion
Topic: Bios
Replies: 4
Views: 2402

Excuse me, Mith. My questions are not my homework. I just reviewed my works, then i found out some problems that i didn't know, so i posted out to let people help me. Is that Okay?
by MIA6
Sun Sep 24, 2006 7:27 pm
Forum: General Discussion
Topic: Bios
Replies: 4
Views: 2402

Bios

1. What does the abbreviation 'ATP' mean? Is that food+oxgen=energy? 2. I don't really know what 'respiration' means? 3. There are 7 categories of classification: Kingdom, phylum, class, order, family, genus, species. But what's the difference among 'class' ,'order' and 'family'? What's the differen...
by MIA6
Fri Sep 15, 2006 3:32 am
Forum: General Discussion
Topic: expt
Replies: 7
Views: 3012

expt

Why when we do the experiment, we need to have large sample sizes?

Thanks.
by MIA6
Thu Sep 14, 2006 1:31 am
Forum: General Discussion
Topic: Experiment
Replies: 1
Views: 1459

Experiment

1. Characteristics of a good experiment are ..... 2)have a large sample size of subjects --> better statistics. ...... 4) reviewed by peers. {I don't really understand those two characteristics?} 2. Are independent variable and the control group the same? Are dependent variable and the experimental ...