Biology - September 2007

ecology

2007-09-24 23:35:44 · 14 answers · asked by Anonymous

Recessive trait in Genetics--Biology.

2007-09-24 21:12:15 · 0 answers · asked by Blah. 2

I have this science project that is an imaginary space station. You can think of it as a mini Earth. It is same as Earth, but it is just a space station and is much smaller. (Has less species of animals/plants :) ...)

MY question is what does it mean to describe the path of energy and matter through living systems and the physical environment?? I get the energy, they are passed by eating but what is matter? How can matter be passed????? To illustrate the path of energy/matter how should I draw it out? By using a food web or what?

2007-09-24 20:03:38 · 1 answers · asked by Anonymous

(a) Which type of organisms remove
1. carbon dioxide frm the atmosphere
one of my answers is : Plants,
But i don't have an idea of the other organisms

2. nitrogen frm the atmosphere
one of my answers is : Rhizobium Bacteria
But what other organisms?

(b) By which processes do microorganisms return

1. carbon dioxide to the atmosphere.
my answers are; respiration, decomposition
is fossilisation correct? i mean when the fuel is burnt, CO2 is returned to atmos

2. nitrogen to the atmosphere.
one of my answers is: denitrification
R there other processes?


(c) What are the main human impacts on
1. carbon cycle
2. nitrogen cycle


Thanks

2007-09-24 19:52:05 · 5 answers · asked by Mystic healer 4

what is the scientific answer for friut loops turning poop green

2007-09-24 17:05:45 · 8 answers · asked by mr_oden76 2

2007-09-24 16:33:22 · 7 answers · asked by Anonymous

hey guys!! I have Genetics Honors and unfortunately I'm clueless about it! Can you give me a website that u can think has enough information about genetics? Thanks! And some other tips on what to study!

2007-09-24 16:03:06 · 4 answers · asked by chinita 2

2007-09-24 16:01:57 · 7 answers · asked by phillipsteak 1

To see how they affected the environment?
And is it true that our Government paid for it using our tax dollars?

2007-09-24 15:50:07 · 7 answers · asked by Adelaide B 5

like, definition, and provide an example if you can, please.

2007-09-24 15:40:41 · 1 answers · asked by Reina 2

Which 2 of the following species are more closely related:

Entamoeba histolytica,


Eshericha Coli,


Entamoeba Coli


and why?

2007-09-24 15:28:13 · 2 answers · asked by Ur Mom 2

2007-09-24 15:24:56 · 2 answers · asked by Anonymous

Charles Darwin was most frustated in his attempt to explain____.
a. how the environment affects the relative survival of organisms with different variations
b. how hereditary info is passed on and used
c. what extinct organisms might have looked lke
d. why natural selection takes more time than domestic breeding
e. why different organisms developed different adaptive traits

Hint: it isn't e.

2007-09-24 15:20:30 · 7 answers · asked by Anonymous

2007-09-24 14:40:02 · 3 answers · asked by Amanda 1

I need to make notecards answering some questions. They have to do with Bromthymol Blue. The problem is: "What reationship exists between aquatic plants (Elodea) and animals (snails) in the cycling of matter?"

The questions I haven't found the answers to are:
1. Which cycle is being investigated?
2. What substances are involved?
3. Which organisms produce which substances?
4. Which organisms use which substances?
5. What processes are involved?

Some internet sources in which I could find the answers to these questions would be a lifeaver to me! Thanks so much!

2007-09-24 14:22:09 · 2 answers · asked by Tayler 2

I have a project about a self-sustained imaginary space station. it is basically a mini-earth. Everything is the same as Earth except that it has no fish, and fewer animals/plants/etc.

For details look at my other questions :)

For this project I have to describe and illustrate the path of energy and matter through living systems and the physical environment . <--- I do not get this part... What does this mean??? energy and matter ??

The things I need are the foob web/chain (know this) , trophic levels (what is this?? Do not get this), and biomass(What is this)..

and how should I draw out a trophic level, biomass............ plz help

2007-09-24 14:11:43 · 2 answers · asked by Anonymous

2007-09-24 13:32:13 · 7 answers · asked by ry ry 3

2007-09-24 13:31:11 · 5 answers · asked by ry ry 3

2007-09-24 13:30:59 · 2 answers · asked by bkekcc 3

Which of the following is not a characteristic of the class Chondrichthyes?
(a) Cartilage Skeleton
(b) Gill slits near the throat
(c) Live in fresh water
(d) Are ovoviviparous

2007-09-24 13:22:05 · 3 answers · asked by Kenster102.5 6

worth 10 points.

2007-09-24 13:07:47 · 3 answers · asked by Anonymous

2007-09-24 12:42:17 · 2 answers · asked by Terri L 2

Somehow, the scientific community has failed to communicate the difference between Darwin's concept of 'origin of species' (which means how one-celled life forms self-propagated into all the different species we have on the planet today) and how/why life itself came to be, which evolution doesn't try to answer.

How can scientists communicate this to the religions, especially the fundamentalists? It's important, as religion still rules the world through the leaders of both the East and the West, and the LAST thing we need is another Dark Ages.

Any good opinions out there?

2007-09-24 12:41:39 · 4 answers · asked by nora22000 7

Around hydrothermal vents on the ocean floor we expect to find ????? bacteria producing carbohydrates.

2007-09-24 12:40:45 · 1 answers · asked by Anonymous

Cilia
Peroxisomes
Microtubules & Microfilaments
Plasma Membrane
Nuclear Envelope

And please dont insult me that i cant figure it all out, afterall, its homework help. Thx =]

2007-09-24 12:33:54 · 2 answers · asked by Anonymous

2007-09-24 11:07:03 · 2 answers · asked by rafael t 1

2007-09-24 10:55:16 · 2 answers · asked by wyfh 2

Worldwatch Report: Oceans in Peril
September 21, 2007


Our planet's oceans are in deep, deep peril, says a new report from the Worldwatch Institute. The only road to recovery may be to declare 40 percent of the world's oceans off-limits to human exploitation to ensure the restoration of life in depleted areas.
Seventy percent of the Earth's surface is covered by ocean, and three-quarters of the population live in coastal areas. We are all dependent on marine resources - yet our oceans are facing threats that include overfishing, toxic pollution, climate change and whaling.
A new report from the prestigious Worldwatch Institute, Oceans in Peril: Protecting Marine Biodiversity, calls for these marine reserves - areas where all extractive and destructive activities, including fishing are prohibited - while giving an alarming snapshot of the shocking state of the world's oceans. It's a wake-up call that should jolt the complacency of policy makers worldwide.

Written for the Worldwatch Institute by a team of experts - Greenpeace's Science Unit in the UK's Exeter University - Oceans in Peril updates an earlier study by the same team in 1998. They have been staggered by the scale and rate of destruction that has taken place in less than a decade in every ocean on Earth.


©Greenpeace/Grace Sharks entangled in a Japanese driftnet


The Science Unit provides crucial scientific expertise to our campaigns, and has a long history of working on oceans issues, including whaling, toxic pollution, climate change and overfishing.

"Recent studies such as the one which shows how 90 percent of the world's large predatory fish, which include the sharks, swordfish and tuna, have disappeared due to overfishing since the 1950s have helped expose what has been happening under the waves and have therefore been out of sight and out of mind to most people", says Paul Johnston, Greenpeace's chief scientist.

Oceans in Peril details new and emerging threats, such the increasing acidification of the world's oceans, and underscores how the race for ever-diminishing resources is forcing marine ecosystems to the point of collapse.

The report illustrates how 76 percent of the world's fish stocks are fully or overexploited, an estimate borne out by figures from the United Nations Food and Agriculture Organization (FAO), which suggest that 158 million tons of fish were harvested worldwide in 2005 - a seven-fold increase since 1950. Catch records between 1950 and 2000 show the "collapse" of 366 out 1,519 fisheries worldwide, most famously the Grand Banks cod fishery off Newfoundland.


©Greenpeace/Grace Orange Roughy and bycatch in the Tasman Sea

Oceans in Peril also details the pitfalls of fish farming, the supposed magic bullet of marine resources with alarming statistics: producing carnivorous animals such as salmon or marine shrimp requires 2.5 as much fishmeal as the amount of saleable fish eventually produced. For tuna caught in the wild and fattened in "ranches", the weight of fish fed to the tuna is a shocking 20 times more than what is actually produced.

The damage to thousands of marine animals and entire ecosystems by longlining and bottom trawling, as well as overfishing off the coast of developing countries, is made even worse by the estimated 20 percent of the global catch that is illegal, unregulated or unreported. This illegal catch is worth somewhere between $4-9 billion a year. While countries with enough resources to control their own waters stand some chance of putting measures in place to protect resources, there's little or no regulation of any kind of marine harvesting in international waters - an issue that needs to be urgently addressed at an international level.


500-year old Gorgonian Coral trawled from the sea bottom by a fish net. (Image ©Ministry of Fisheries NZ)

But it's not all doom and gloom - there is a beam of sunshine in the report, including a comprehensive package of measures that if implemented could reverse current trends, restoring the former productivity of our planet's oceans. That solution is the establishment of comprehensive marine reserves all over the world, protecting vulnerable species and habitats, enhancing fisheries beyond the reserve boundaries, and buffering the worst impacts of climate change.

Marine reserves are the single most powerful tool available for arresting and reversing the decline of our oceans and are equally applicable to the high seas as they are to coastal waters. The oceans have immense powers of regeneration and wherever in the world marine reserves have been established marine life is flourishing.

2007-09-24 09:02:02 · 5 answers · asked by yahyouknow 2

2007-09-24 08:14:01 · 2 answers · asked by Terri L 2

the nucleolus
the cytoskeleton
basal bodies
prostaglandins

2007-09-24 07:40:16 · 4 answers · asked by deji a 1