Search found 43 matches

by MIA6
Wed Apr 18, 2007 2:12 am
Forum: General Discussion
Topic: Weather
Replies: 2
Views: 2034

Weather

What's the temperature of a normal weather? maybe i can not say: normal, but a comfortable temperature? Hope you can tell me, thanks.
by MIA6
Mon Apr 09, 2007 12:42 am
Forum: Genetics
Topic: plant reproduction
Replies: 2
Views: 2942

plant reproduction

1. Grafting permits the groweer to combine desirable characteristics of two plant varieties in a single plant. For example, the stock may have roots which are resistant to soil pests, whereas the scion may bear a desirable kind of fruit. However, there is no mixing of the heredity of the scion and s...
by MIA6
Wed Mar 28, 2007 10:59 pm
Forum: Genetics
Topic: Diploid
Replies: 2
Views: 2135

Diploid

The Diploid number (2n) of chromosomes is restored during ______ (1) fusion of gametes, (2) mitosis. This question actually has four choices, but i just gave you two possible answers here. My teacher said the answer was (1), but i thought (2) could work, too. because it's from 2n to 2n. But if the a...
by MIA6
Wed Mar 28, 2007 3:17 am
Forum: Genetics
Topic: Reproduction
Replies: 4
Views: 4563

Reproduction

1. In sexual reproduction, man has primary sex cells in the testes, so my questions is: how many primary sex cells release sperms once? it's not that only one primary sex cell releases sperms once, right? It can be 'many' primary sex cells release sperms at the same time? So how about women? How man...
by MIA6
Sun Mar 11, 2007 2:19 am
Forum: General Discussion
Topic: stimulus
Replies: 2
Views: 1734

stimulus

There was a multiple-choice question that I didn't get it right. What is one characteristic of a stimulus? <I will only give you two choices because I felt only these two choices could be possibly the right answer> 1. It may be synthesized in a dendrite. 2. It may initiate an impulse. I felt number ...
by MIA6
Mon Mar 05, 2007 1:09 am
Forum: General Discussion
Topic: diabetes
Replies: 5
Views: 5111

diabetes

In diabetes, the loss of glucose excreted in the urine is accompanied by a loss of water from the body. I read this in the book, but i have a question: diabetes is a disease lacking of insulin, so it means that there is too much glucose, so how come here is 'the loss of glucose' and why there is als...
by MIA6
Tue Feb 27, 2007 4:05 am
Forum: General Discussion
Topic: Nerves
Replies: 2
Views: 2347

Nerves

I want to ask some questions about nerves: 1. Stimuli such as pressure, light, and sound do not travel along a nerve. Does it mean like stimulus certainly will not travel along a nerve but it lets an impulse travels along a nerve, or specifically, axon? 2. The electrical and chemical nature o...
by MIA6
Sun Feb 25, 2007 4:27 am
Forum: General Discussion
Topic: ice
Replies: 4
Views: 2254

ice

What causes a melting of the polar ice caps? I know it relates to the global warming, but i don't know how come ice caps melt, is anything to do with acid rain or greenhouse effect or the rise in sea level?
Thanks for help.
by MIA6
Mon Feb 05, 2007 12:31 am
Forum: Physiology
Topic: urea
Replies: 4
Views: 5942

urea

What's the relationship between 'urea' and 'urine'? Is that much urea forms urine? Please tell me, thanks.
by MIA6
Wed Jan 10, 2007 2:56 am
Forum: Human Biology
Topic: Heart
Replies: 16
Views: 20542

Heart

Do veins carry deoxygenatd blood which is filled with CO2? I think some part of veins carry deoxygenated blood to the right atrium. But the heart is pumped by left ventricle, right? so there must be some blood go into the left ventricle to let it work? So then the blood in the right ventricle goes i...
by MIA6
Wed Jan 10, 2007 1:06 am
Forum: Cell Biology
Topic: cells
Replies: 1
Views: 1172

cells

1. What is tissue cell?
2. Most plant cells, once differentiated, no longer undergo cell division. I don't understand its meaning?! 'Differentiate'? be more specific.

Thanks.
by MIA6
Mon Jan 08, 2007 3:08 am
Forum: Cell Biology
Topic: cell membrane
Replies: 10
Views: 24294

Hi, MrMistery. I think according to the picture above and on my book, i think the two surfaces must be lipids, and proteins are just like some points stand out. What i mean is they don't cover the whole surface as lipids shown above do. THat's my point. So even protein span the whole membrane or not...