Biology - December 2006

I have to summarize an article as part of a grade 11 Bio assignment, and here's a section in my article:

"Within five days of removing 20 percent of an adult zebra fish heart ventricle, undifferentiated progenitor cells begin to line the injured area and turn into cardiac muscle cells, which grow and divide, building new heart muscle"

I need to put this sentence into my own words, in pretty basic terms. So...I'm not exactly sure what this sentence even means...so if someone could explain it to me (since I'm Biology-Impared) then it would be a big help =)

2006-12-03 16:38:06 · 5 answers · asked by Anonymous

2006-12-03 16:33:43 · 1 answers · asked by qaseh 1

2006-12-03 16:14:38 · 5 answers · asked by chocolateT 2

2006-12-03 16:08:32 · 6 answers · asked by ramesh kumar y 1

2006-12-03 16:05:04 · 2 answers · asked by Ted 1

how does cytokinesis differ in plant and animal cells?

2006-12-03 15:55:29 · 4 answers · asked by Sarah 1

2006-12-03 15:46:32 · 2 answers · asked by victoria j 1

2006-12-03 14:57:40 · 4 answers · asked by ROD JOHN 1

2006-12-03 14:43:06 · 0 answers · asked by Jenn 2

2006-12-03 14:39:46 · 3 answers · asked by tyler02b 1

Can you please check over thiss for me...Thank youuu...

Note: Elodea is a fresh water plant.

a) Elodea cells normally contain 1% salt and 99% water.
b) Tap water contains 1% salt and 99% water.
c) Salt water contains 6% salt and 94% water.
d) Salt water has a higher concentration of salt than fresh water or Elodea cells.

Answer the following questions using the information above about the cell in salt water:

1) What is the percentage of water outside the cell at the start?- 94
2) What is the percentage of water inside the cell at the start? -99
3) How do the percentages compare? - the percentage of water inside the cell is higher than that of outside the cell
4) When will water move across the cells membrane? -during osmosis?
5) WOuld the cell shape change once it was placed in the tap water? -yes because the cell was trying to equal the concentration of water and salt inside and outside of it...

is all of this correct? if not, can you please correct my answers

2006-12-03 14:26:38 · 3 answers · asked by Lina 4

2006-12-03 14:24:33 · 2 answers · asked by Anonymous

Please give me a simple definition...Thank you!

2006-12-03 14:06:47 · 4 answers · asked by Lina 4

A) DNA packing and unpacking
B) the binding and unbinding of transcription factors to silencer sequences.
C) The binding and unbinding of transcription factors to enhancer sequences.
D) RNA splicing.
E) Attachment of RNA polymerase to the promoter

2006-12-03 14:01:35 · 3 answers · asked by Anonymous

Choices are:skeletal or muscular.

2006-12-03 13:59:54 · 4 answers · asked by Anonymous

How did the ingredients of a buffer solution assisted in the extraction of DNA?The experiments purrpose was to extract DNA from a banana. The banana was squished until it was all mushy. Then it was mixed with a buffer solution that contained shampoo,baking soda,salt,and distilled water. I know the shampoo dissolves the lipids and proteins of the cell. During this process the cell membrane is being broken down and the bonds that hold the cell membrane together are filtered out. The baking soda in the buffer solution regulated the pH level of the substance.But can you please help me with the other 2-salt and distilled water. Thanks in advance=)

2006-12-03 13:58:49 · 2 answers · asked by SweetLatina 2

lets say you get one of those things where you have the sperm and egg put together and then put back inside the woman but you have male cat DNA mixed with it would the egg die? would it be born with cat like features? or would it just have cat like genes like being able to see in the dark or jump high if the zygote lived?

2006-12-03 13:46:01 · 9 answers · asked by Peace ☮ 2

Choices are: skeletal or cardiac.

2006-12-03 13:43:01 · 3 answers · asked by Anonymous

2006-12-03 13:40:42 · 5 answers · asked by Anonymous

Can you please check over thiss for me...Thank youuu...

Note: Elodea is a fresh water plant.
a) Elodea cells normally contain 1% salt and 99% water.
b) Tap water contains 1% salt and 99% water.
c) Salt water contains 6% salt and 94% water.
d) Salt water has a higher concentration of salt than fresh water or Elodea cells.

Answer the following questions using the information above about the cell in tap water:

1) What is the percentage of water outside the cell?- 99
2) What is the percentage of water inside the cell? -99
3) How do the percentages compare? - they are equal
4) WOuld the cell shape change once it was placed in the tap water? -no because the level inside the cell is equal to the level outside the cell

Please correct me if I am wrong...Thank youu!

2006-12-03 13:31:38 · 4 answers · asked by Lina 4

is it true u cannot clone from dna alone. so basically we can only take dna from a living thng and clone its dna? it doesnt work if something was dead?

2006-12-03 12:38:24 · 2 answers · asked by Richard C 3

Island populations do NOT exhibit which of the following when compared to the mainland populations from which they are derived?

1. greater variability

2. greater extinction rates

3. fewer heterozygous loci

4. large chance fluctuations in allele frequencies

5. less genetic drift

(I thought it was #3, but got it wrong. if you come up with an answer please explain why. Thanks a bunch!!)

2006-12-03 12:26:59 · 3 answers · asked by wendy h 3

I need some help here, any help would be freakin sweet. This is on my biology take home test. Its pretty dumb and random, but here it goes...
If you have a loaded pizza and an ice cream float for lunch, each of the five kingdoms is represented either as an ingredient or in production or processing of an ingredient. List the 5 kingdoms and identify at least one ingredient with each kingdom. (I think) The five kingdoms are plant, animal, fungi, protista, and prokaryotic.

2006-12-03 12:21:50 · 1 answers · asked by ? 2

I haven't noticed that in any species other than humans and their breast swell with milk only while they have sucklings. Why are we different?

2006-12-03 12:14:58 · 5 answers · asked by Anonymous

I am a str8 A student and I have tried my best on this lab report but have NO ideaaaa what the answers to these questions are...PLEASEEE help meee...

This is what it says:

a) Elodea cells normally contain 1% salt and 99% water.
b) Tap water contains 1% salt and 99% water.
c) Salt water contains 6% salt and 94% water.
d) Salt water has a higher concentration of salt than fresh water or Elodea cells.

Answer the following questions using the information above about the cell in tap water:
1) What is the percentage of water outside the cell?
2) What is the percentage of water inside the cell?
3) How do the percentages compare?
4) WOuld the cell shape change once it was placed in the tap water?

THANK YOU SOOOO MUCHHH! MAY ALL YOUR WISHES COME TRUE!

2006-12-03 11:55:07 · 2 answers · asked by Lina 4

2006-12-03 11:54:38 · 9 answers · asked by Anonymous

i kno this is really random and a long shot but im suck on a question for my bio final study guide...
"which species would have the highest levels of interspecific competition in a community?"
i ve asked my TA, ive googled/yahoo'd it... NOTHING!
please helP!!!

2006-12-03 11:28:06 · 2 answers · asked by ihatefinalsweek 2

and how are the reactants delivered to the cell?

thanks!

2006-12-03 11:00:06 · 1 answers · asked by louish 1

I have to say that on this website I have found some pretty poor excuses for organisms, I think THEY might be fake

Honestly, some of them, and you know who you are, put your entire phylum to shame

2006-12-03 09:25:50 · 16 answers · asked by Anonymous

2006-12-03 09:10:21 · 3 answers · asked by dioreaddiction 1