Search found 8 matches

by risingstar5
Sun Apr 23, 2006 6:30 pm
Forum: Botany Discussion
Topic: Plant mass
Replies: 3
Views: 2297

Plant mass

most of the total mass of a plant comes from what?

-N2
- O2
-CO2
- H2O
- H2

im thinking maybe H2O? or CO2?
can anyone confirm....? :?:
by risingstar5
Sun Apr 23, 2006 6:23 pm
Forum: Human Biology
Topic: Tasks of Blood
Replies: 2
Views: 2337

Tasks of Blood

just after injecting the blood in the left ventricle with 14C, it would be detected performing the task of - picking up O2 from the systemic capillaries of the body - dropping off O2 in the systemic capillaries of the body - picking up O2 in the capillaries of the lungs - dropping off CO2 in the cap...
by risingstar5
Sun Apr 23, 2006 5:39 pm
Forum: Genetics
Topic: imbreeding
Replies: 2
Views: 2771

its either a or b... but i could use some confirmation on that too!
by risingstar5
Sun Apr 23, 2006 5:36 pm
Forum: Genetics
Topic: genetics problem
Replies: 7
Views: 4143

i got 1/4

because if you cross BB (brown eyes) with bb (green eyes) the blue eyed cows would be Bb
so if you cross the two blue eyed cows (Bb x Bb) then only 1/4 of those would be BB (brown eyes)

i hope that helped and i hope its right!! ;)
by risingstar5
Sun Apr 23, 2006 5:33 pm
Forum: Genetics
Topic: genetics problems ahh
Replies: 2
Views: 2028

yeah the second one is 50%....well at least thats what i got too
by risingstar5
Fri Apr 21, 2006 8:06 pm
Forum: Molecular Biology
Topic: DNA Denaturation
Replies: 9
Views: 4612

DNA Denaturation

at what temperature does DNA denature?

which base pairs have a higher denaturation point? - guanine/cytosine or adenine/thymine?
by risingstar5
Fri Apr 21, 2006 7:01 pm
Forum: Cell Biology
Topic: Simple Diffusion`
Replies: 7
Views: 19902

oops... i misposted two of those

its either one of these

- the movement of oxygen in the alveoli across the epithelial membrane and into the bloodstream
or
- the uptake of neurotransmitters
by risingstar5
Fri Apr 21, 2006 3:39 am
Forum: Cell Biology
Topic: Simple Diffusion`
Replies: 7
Views: 19902

Simple Diffusion`

which of the following is an example of simple diffusion through a membrane? - the movement of H+ across the thylakoid membrane during photosynthesis - the uptake of neurotransmitters by the postsynaptic membrane during the transmission of a nerve impulse - the movement of oxygen in the alveoli acro...