Biology - November 2007

Hi could anyone please help me relate the structure to function of the mitochondria please, also does anyone know the importance of the mitochondrion reproducing independantly of the cell in which it is found.

Any help is greatfully recieved. thankyou

2007-11-15 07:50:12 · 4 answers · asked by Anonymous

what are they wat do they do.

2007-11-15 07:45:49 · 1 answers · asked by juiced50 2

2007-11-15 07:36:37 · 2 answers · asked by lindar 2

although i probably have the answer in my notes, im confused as to how they work.

2007-11-15 07:18:43 · 0 answers · asked by kellysa111 3

Thanks so much!

2007-11-15 07:16:27 · 8 answers · asked by Anonymous

2007-11-15 07:09:56 · 1 answers · asked by baby_girl_clover 1

i need help with an esaay question thanks

2007-11-15 06:55:31 · 1 answers · asked by Anonymous

I'm looking for a comparison of CO2 output from an automobile & a human being.

2007-11-15 06:50:26 · 1 answers · asked by bentoro2001 1

a 2
b 32
c 34
d 36

2007-11-15 06:21:18 · 3 answers · asked by WuteverIDC 1

In meiosis, the chromosomes replicate only once in the preceding interphase.

All the events unique to meiosis occur during meiosis I.

Meiosis provides for asexual reproduction.

In mitosis, the chromosomes replicate only once in the preceding interphase.

Mitosis provides for growth and tissue repair.

2007-11-15 06:01:03 · 2 answers · asked by Scigirl 3

When a sea horse sees a predator, its nervous system kicks into high gear. Which structure is responsible for transmitting signals from one nerve cell to the next?
a) Golgi body
b) nucleus
c)ribosome
d)cell membrane

2007-11-15 05:46:02 · 3 answers · asked by Anonymous

Despite its name, the Pacific sea horse is actually a type of fish. Its horse-shaped head gives it its name. This creature lives in the Pacific waters off the west coast of the Americas, from Peru to Southern California. Like many other ocean fish, sea horses face the constant challenge of losing water to their saltier environment.

When a Pacific sea horse’s body loses water to its environment, which process is responsible?
a) active transport
b) osmosis
c) endocytosis
d) exocytosis
When the sea horse eats a meal, its body breaks down organic molecules in the food. Some of those molecules enter cellular respiration, which ultimately produces the molecule ATP. In which part of the sea horse’s cells is ATP produced?
a) mitochondria
b)Golgi bodies
c)vacuoles
d)lysosomes
Help?

2007-11-15 05:44:27 · 3 answers · asked by Anonymous

(A)monohybrid
(B)dihybrid cross
(C)homozygous

2007-11-15 04:36:11 · 3 answers · asked by Hannah L 1

Not all adults feed at a high trophic level. Whale sharks (50 ft) are the largest fish and feed on plankton and small fish, while Great White sharks (20 ft) are the largest carnivorous fish and feed on sea lions, seals and large fish. Blue whales (100 ft) are the largest whale and feed primarily on plankton and krill, while the Sperm whale (45 ft) is the largest carnivorous whale feeding on fish and very large squid.
(a) How does the location of each animal's position in relation to the producers contribute to their size? Be sure to look at the food chain and the amount of energy that is being transferred between the levels.
(b) Why do you suppose the plankton feeders are able to attain such large sizes compared to the carnivores?

2007-11-15 04:26:43 · 3 answers · asked by LM1127 3

Cellular (aerobic) respiration takes place in the presence of and with the use of which of the following?

a oxygen
b carbon dioxide
c water
d sunlight


2. Which of the following would happen to a cell if cellular respiration suddenly ceased?

a Glucose breakdown would increase.
b ATP production would increase significantly.
c Glucose breakdown would nearly stop or cease entirely.
d The cell would use water for energy.


3. The early organisms on earth also needed to break down glucose to generate energy to survive. Which of the following processes did they most likely use?

a anaerobic respiration
b aerobic respiration
c photosynthesis

2007-11-15 04:26:03 · 2 answers · asked by Anonymous

a. sound waves enter the ear canal and strike the eardrum.
b. the fluid in the cochlea moves
c. the auditory nerve carries nerve impulses to the brain.
d. all of the above.

2007-11-15 03:41:19 · 8 answers · asked by BD M 1

Try to give me the best explanation that you possibly can please kiddos.

2007-11-15 03:22:01 · 8 answers · asked by Anonymous

2007-11-15 02:57:10 · 1 answers · asked by Anonymous

2007-11-15 02:56:58 · 7 answers · asked by Anonymous

Herbie eats excessive amounts of hotdogs each week. They are preserved with sodium nitrite, but his stomach is slowly finding out as it's acid converts the sodium nitrite to nitrous acid, a weak mutagen. In the lining of Herbie's stomach three little cells each experience a mutation in their DNA and it happens to be in the very same gene--a kinase gene called src. (Src is an example of what Dr. Howard Temin called a "proto-oncogene.) But the three little cells each experienced a different kind of mutation in that gene:

Cell #1's src DNA was altered so that it's product is present in normal amounts, but no longer functions.

Cell #2's src DNA was altered so that it produces almost no gene product at all.

Cell #3's src DNA was altered so that it's gene product has normal function but is overproduced.

Which cell is more likely to become cancerous and why?

2007-11-15 02:55:19 · 2 answers · asked by Carl B 1

ok so there is a type A type B type AB and type O.. what are the percentages for average people haveing these blood types?!!

2007-11-15 02:43:10 · 4 answers · asked by Anonymous

2007-11-15 02:31:46 · 6 answers · asked by Anonymous

gram negative bacilli or cocci.....its ok just five......

*___________*

2007-11-15 01:39:25 · 3 answers · asked by Malos 3

2007-11-15 00:51:40 · 6 answers · asked by brandyn 1

2007-11-14 23:48:43 · 5 answers · asked by sonny 1

Bearing in mind that evolution has been proven why therefore do we still have nails on our fingers and toes if they were originally used as, say, talons to subdue and kill prey ?. We haven't needed them for for that purpose for centuries or even millenia.

2007-11-14 22:47:23 · 14 answers · asked by Milking maid 5

hey..
for a nat select question i got for an assessment i have to pick an example of natural selection.....
i was gonna use the peppered moth but my book isays it is well known but recently discredited
does that mean i shouldn't use it :S

2007-11-14 19:44:33 · 5 answers · asked by Anonymous

2007-11-14 17:56:28 · 4 answers · asked by holly f 3

2007-11-14 17:54:46 · 9 answers · asked by holly f 3

what subcellular structure is involved in translation? Of what two types of molecules is it composed?

2007-11-14 17:50:26 · 3 answers · asked by Anonymous