Biology - February 2007

One method of obtaining hydroelectic energy involves building dams to control rivers and streams. Some environmentalists object to this method because it

A. produces air pollution
B. pollutes the rivers and streams
C. involves a renewable resource
D. changes the ecology of the surrounding area

2007-02-22 14:53:03 · 5 answers · asked by exxohh<3 1

As a result of sexual reproduction, an organism can pass a genetic mutation to its offspring if the mutation occurs in

A. a body cell
B. a gamete
C. liver tissue
D. white blood cells

2007-02-22 14:51:24 · 8 answers · asked by exxohh<3 1

what does edulis mean?

2007-02-22 14:38:01 · 5 answers · asked by soni 3

THANK U!!^^
i appreciate the help!!

2007-02-22 14:35:38 · 4 answers · asked by teresa 1

2007-02-22 14:28:05 · 7 answers · asked by Sonderval 2

2007-02-22 14:20:16 · 5 answers · asked by rikihess 1

2007-02-22 14:16:10 · 3 answers · asked by bleach145 1

Discuss how recombinant DNA techniques may be used to correct a point mutation.

Please Help! AP Student

2007-02-22 14:13:02 · 2 answers · asked by iqbalkhanayesha 2

2007-02-22 14:05:06 · 8 answers · asked by Anonymous

sites for restriction enzymes

DNA Segment Lengths

-----------------------------------------------------------------------------
400 X 500 Y 1,200 X 1300 Y 1500

Enzyme (the letters)

(A) Explain how the principles of gel electrophoresis allow for the separation of DNA fragments.
(B) Describe the results you would expect from electrophoretic separation of fragments from the following treatments of the DNA segment above. Assume that the digestion occurred under appropriate conditions and went to completion.
I. DNA digested with only enzyme X
II. DNA digested with only enzyme Y
III.DNA digested with enzyme X and enzyme Y combined
IV. Undigested DNA

(C) Explain both of the following:
(1). The mechanism of action of restriction enzymes
(2). The different results you would expect if a mutation occurred at the recognition site for enzyme Y.
Please help

2007-02-22 14:02:13 · 3 answers · asked by iqbalkhanayesha 2

2007-02-22 13:24:32 · 4 answers · asked by Anonymous

The other day I was doing a practice Biology exam and got a little confused on these two questions. Is my line of thinking correct for these?

1. "T or F: If a reaction with a +3 ∆G is coupled with ATP hydrolysis, these reactions are overall spontaneous."

+3 ∆G means the reaction is not spontaneous, and I am assuming ATP hydrolysis will lower the free energy and make it spontaneous, right? But by how much?

2. "T or F: ATP can be coupled to an endergonic reaction, to drive the reaction forward."

ATP has stored up energy, right? So it will give that energy to the reaction which drives it forward? Or does this question mean that energy goes into a reaction that feeds the ATP?

Anyway, I hope someone can help me... I don't want you to do my homework or anything, I just need a little nudge.

2007-02-22 13:13:38 · 1 answers · asked by cj20eight 1

2007-02-22 13:04:03 · 5 answers · asked by Anonymous

i not sure the answer, i think is RNA, but really not sure

2007-02-22 12:49:31 · 1 answers · asked by teck kim 2

Recent findings in China revealed feathered dinosaur fossils which could be Evolution's missing link between reptiles and birds.What do you think?

2007-02-22 12:39:58 · 4 answers · asked by starjammer 3

I need to find a picture of it for my biology homework. Anyone got a clue?

2007-02-22 12:37:43 · 3 answers · asked by Jenn M 1

During summer, leaves are generally bright green. What would you hypothesize that this indicates about the role of green light wavelengths, cholorphyll, and the photosynthetic process?

2007-02-22 12:24:57 · 2 answers · asked by Mike R 2

Indicate the type of cell in which these junctions would be found.

Need help on this one. Thanks

2007-02-22 12:06:26 · 1 answers · asked by cosmo 1

2007-02-22 12:05:28 · 12 answers · asked by Anonymous

hi people!!the last word are interact with a!!can u give me a defense too

2007-02-22 11:56:39 · 2 answers · asked by Anonymous

2007-02-22 11:42:50 · 7 answers · asked by Eggroll 2

I'm wondering if anyone knows where I can get some pictures or charts that analogize a cell. Like showing it as a factory or a store or something. I'm taking a cell bio class and my teacher doesn't speak much English, so I need all the help I can get. Thanks. ;P

2007-02-22 11:18:19 · 3 answers · asked by silvershard 2

the shape of DNA is called ____.this mean is looks like a ____. and __________________is when DNA copies it self .this process occurs before cell division , or ____________

2007-02-22 11:14:11 · 11 answers · asked by allison z 1

i met this guy and he his height is 6.4 and his mum and dad is not that tall...
his big brother is 5.4 and sister is 4.7

how is it possible?

2007-02-22 11:01:23 · 6 answers · asked by Anonymous

2007-02-22 10:43:17 · 3 answers · asked by grumpycandy_0 1

Im in 9th grade and in were starting biolgy and i have no clue sbout!!HELP ME PLEASE!!!!!!!!!!!!!!!!!!!!

2007-02-22 10:33:48 · 12 answers · asked by ♥Brittany♥ 1

2007-02-22 10:33:05 · 6 answers · asked by Anonymous

2007-02-22 10:27:17 · 3 answers · asked by Anonymous

2007-02-22 10:04:11 · 3 answers · asked by helpme06 1

2007-02-22 10:00:15 · 9 answers · asked by Anonymous