Biology - April 2007

I need to rite a big paper for biology.. HELP!!!! PLEASE!!!

2007-04-30 06:27:55 · 3 answers · asked by Katie W 1

Many cnidarians have two distinct life stages called:


a. the gametophyte and the sporophyte.
b. the polyp and the medusa.
c. egg and adult.
d. egg and larva.

2007-04-30 06:26:32 · 6 answers · asked by Anonymous

I understand that there are some challenges from critics of Darwinism. Do any of them have merit, and if so, which issues are the most challenging? Please provide documentation wherever possible. Thanks.

2007-04-30 06:26:16 · 13 answers · asked by Advisorpro06 3

2007-04-30 05:48:06 · 5 answers · asked by Binder Singh 2

lol, i'm serious, because i read this on another question:

"The human brain, it absorbs forty megabytes per second of data while awake. That is two terabytes of data a day. At night, it sorts and stores that data through the creation of new chemical bonds and synaptic connectors."

2007-04-30 01:58:22 · 3 answers · asked by Sorrowful W 2

2007-04-29 23:19:41 · 31 answers · asked by Lambkin Lamert 1

why do we have less hair than them?
tribes which live in places such as the amazon rainforest, like the kayapo which are surrounded with these creatures, do not seem to be hairy compared to us, why is this?

thanks,

2007-04-29 23:05:46 · 20 answers · asked by Anonymous

i need answers to the following plz



1) explain the difference between organic and inorganic substances




2) describe the fluid mosaic model of the cell membrane.




3)what is meant by 'selectivley permayable'?( in cells)




4)distingush between the process of diffusion, osmosis and active transport( i need a diagran...or in this case a link showing diagram)





5) what is facilitated diffusion?




6) what is meant by 'surface area to volume ratio' ?




7) explain why large surface area to volume is important for cells?



plz number ur answers,,,thnx beforehand :)

2007-04-29 21:55:36 · 3 answers · asked by Anonymous

A. to engulf large particles.

B. to export pre-packaged neurotransmitters.

C. all the options.

D. to absorb specific molecules present at low concentration.

E. to accumulate droplets of the extracellular solution.

2007-04-29 20:05:05 · 4 answers · asked by maxiimus1978 1

2007-04-29 19:52:33 · 3 answers · asked by bb_lyn17 1

genes evolve could our that far

2007-04-29 19:15:41 · 11 answers · asked by ben_grossi 1

If the bacterial cell is a 3 dimensional structure,being surrounded by the cell wall on all sides(unlike the 2D figure we see in our books),then how is dat we r able to see the stained or unstained components of the cytoplasm from the outside of the cell wall using a light microscope?

2007-04-29 19:01:21 · 5 answers · asked by Aashutosh 1

Does Diaploid mean two copies of chromotid(' l '), or two copies of chromosomes(' X ')?
Same as haploid, does it mean one copy of chromotid, or one copy of chromosome?

2007-04-29 18:27:50 · 4 answers · asked by coolbun2003 1

population,natural selection, adaption, vestigial structure, homologous structure, gradualism, punctuated equilibrium, divergence, industrial melanism, speciation, reproductive isolation, Paleontologist

2007-04-29 18:23:18 · 3 answers · asked by Anonymous

1. Why was the kingdom monera divided into two separate kingdoms? 2. Why might Protista be though of as the odds and ends kingdom? 3. Which kingdom includes only prokaryotes, and which only heterotrophs?

2007-04-29 17:50:40 · 4 answers · asked by sean 2

a. mRNA
b. tRNA
c. DNA
d. amino acid

The concept of adaptive mutation suggest that

a. mutations in the genetic code are random in origin
b. mutations in the genetic code might be created in response to the environment
c. mutations weed out less desirable traits in a population
d. mutations force an organism to adapt to a new environment

A base substitution mutation would not change the number of nucleotides in the gene.
a. True
b. False
My microbiology students expose their bacterial cultures to short-wave ultraviolet light for 1, 2 and 3 minutes. The next class period they check to see if any cultures survive. Typically, any culture exposed for 2 minutes or more dies. How does ultraviolet light cause cell death?
a. spontaneous mutation b. adaptive mutation
c. induced mutation d. somatic mutation

2007-04-29 17:15:51 · 3 answers · asked by ashley a 1

a. carbon monoxide
b. carbon dioxide
c. hydrocarbons
d. methane
e. all of the above

2007-04-29 17:01:00 · 2 answers · asked by Ban H 1

1. How does geographic reproduction affect speciation?

2. How does the fossil evidence support evolutionary theory?

3. How does infection (?) protect an individual from infectious disease? (It doesn't seem to make sense to me how an infection can protect someone from infectious diseases. Unless it was meant to say 'vaccination')

4. Why may an individual with a compromised immune system be unable to fight off and survive infections by microorganisms that are usually benign?

Help is appreciated.

2007-04-29 16:39:47 · 2 answers · asked by M 2

A. Hemolysins lyse red blood cells
B. Kinase destroy fibrin clots
C. Leukocidins destroy neutrophils
D. Coagulate destroys blood clots
E. Hyaluronidase breaks down substances between cells

2007-04-29 14:47:32 · 3 answers · asked by Anonymous

What changes are being made in human right now? Physical or mental?

2007-04-29 14:42:22 · 6 answers · asked by Susie S 1

How did the "Ur-organism" come about. Abiogenesis is generally used to explain this, but does that not contradict Francesco Redi's experiment that refuted Spontaneous generation?

2007-04-29 13:56:04 · 3 answers · asked by Anonymous

I) As N approaches K, r increases
II) As N approaches K, b increases
III) As N approaches K, d increases

2007-04-29 13:17:32 · 1 answers · asked by swt16 1

2007-04-29 13:11:06 · 6 answers · asked by Anonymous

(a) Define natural selection and artificial selection.
(b) List 3 similarities and 3 differences between the two

2007-04-29 12:59:29 · 3 answers · asked by mandy 1

I need to know about the development process of a horse's eggs. Basically how the eggs inside the horse's body change and become embryos and develop further until it becomes a foal.

2007-04-29 12:59:23 · 1 answers · asked by Molly K 2

okay, i have this science project I have to do and i need to have at least three full pages of info about the tongue. I have the basic info but if any one would like to describe the anatomy of the tongue, i would apprreciate it cuz every website i go to they use big words that are hard to comprehend. **** no silly answers for pounts pleeeese.

thankz

2007-04-29 12:29:01 · 4 answers · asked by little s 2

I) As N approaches K, r increases
II) As N approaches K, b increases
III) As N approaches K, d increases

2007-04-29 09:19:29 · 1 answers · asked by Anonymous

Why does breaking the neck (as in hanging) kill a person, whereas breaking the back does not (but usually causes paralysis)? Isn't it just another part of the same spine? If hanging someone kills them, then why wasn't Christopher Reeve instantly killed in his accident, due to the damage done at the C1 joint? Do people who are hung really just choke to death?

2007-04-29 09:03:24 · 4 answers · asked by FUNdie 7

1 True
2 False

2007-04-29 08:58:18 · 9 answers · asked by Anonymous

1True
2False

2007-04-29 08:56:02 · 3 answers · asked by Anonymous