High School Level Science

Me needy help on ecosytems :o

Me needy help on ecosytems :o

 How can changes in an ecosytem be determined and analyzed

Nalu-Chan   640   1 Reply

bio_man

How are these cells well adapted to their functions?

How are these cells well adapted to their functions?

Olfactory receptor cells.
Rod and cone cells in our eyes.
Stretch receptor cells?

breakeven   2642   1 Reply

bio_man

what does nucleolus do while other organelles in a cell make proteins?

what does nucleolus do while other organelles in a cell make proteins?

i am doing a little project about how a cell can make a protein....
and while i was explaining all the organelles' jobs, i was stuck
what is nucleolus? what does it do to make proteins?
cna you guys pleaseee use easy words bec

gangdongwon3   2754   1 Reply

sarah!

A Balance Between Energy and Matter

A Balance Between Energy and Matter

What might be the effects of increasing amounts of UVR
on productivity?

What indirect effects might increasing UVR have on
animals?

Suggest an approach to counteract increased levels of
UVR in ecosystems. What wou

BlueMoon   9166   1 Reply

bio_man

In stages 1, 2, and 3 of cellular respiration (glycolysis, pyruvate oxidation and the kreb's ...

In stages 1, 2, and 3 of cellular respiration (glycolysis, pyruvate oxidation and the kreb's ...

In stages 1, 2, and 3 of cellular respiration (glycolysis, pyruvate oxidation and the kreb's cycle), every time that two hydrogen atoms are removed form a intermediate (eg. when malate becomes oxaloacetate) and a NAD+ molecule reduces to become

rainbows246   1029   1 Reply

bio_man

much questions about ecology

much questions about ecology

hey every body . i want some help with these 5 sheets . i already did them but i want to check my answers
so these are the 5 sheets

hasanqusay   1009   1 Reply

bio_man

The Changing Atmosphere and Global Warming

The Changing Atmosphere and Global Warming

List four factors that could affect the current oxygen and carbon dioxide levels, and then predict possible effects if the levels changed. Be sure to provide clear and reasonable answers.


The percentage for carbon dioxide, 0.03%, se

BlueMoon   3261   1 Reply

bio_man

How do you recognize the cycling of water?

How do you recognize the cycling of water?

How do you recognize the cycling of water? 

BlueMoon   705   1 Reply

bio_man

some ecological questions

some ecological questions

hey every body >>> i have some easy cheesy ecological questions

1.name an habitat of a tiger?
2.what is your niche? (can i say : I'm a student)

AND THAT'S ALL >>> THANK U    &nbs

hasanqusay   1291   1 Reply

bio_man

echnology is generally developed to meet your needs and to make you better at completing tasks. Disc

echnology is generally developed to meet your needs and to make you better at completing tasks. Disc

Technology is generally developed to meet your needs and to make you better at completing tasks. Discuss how technology affects your ecological footprint positively and negatively.

BlueMoon   4219   1 Reply

bio_man

True or false: cellular respiration

True or false: cellular respiration

1.  The following reaction takes place in animal cells but not in plant cells
             C6H12O6 + 6O2 -> 6CO2 + 6H2O

I picked true but the answer states that it's false.  Does cellula

bob-e   1497   1 Reply

bio_man

Which of hte following is a correct statement about the relationship between pH and the hydrogen-ion

Which of hte following is a correct statement about the relationship between pH and the hydrogen-ion

HI please help me wiht the correct answer and why it is correct. thaaaaankkkkks

1. Which of hte following is a correct statement about the relationship between pH and the hydrogen-ion concentration of a solution?
A. There are no hy

patsfan22   1184   1 Reply

bio_man

Animals produce most of their nitrogen-containing wastes during

Animals produce most of their nitrogen-containing wastes during

Thanks for your help! please help me with the correct answer and an explantion why it is correct

1. Animals produce most of their nitrogen-containing wastes during
A. Protein digestion
B. Carboyhydrate digestion
C. Lipid dig

patsfan22   4518   1 Reply

bio_man

Magnetococcus sp

Magnetococcus sp

What is the full name for Magnetococcus sp. (MC-1) and does it have pili?

peeg   676   1 Reply

bio_man

DNA Gyrase ambiguity

DNA Gyrase ambiguity

Hello,

My textbook first states that "DNA gyrase is an enzyme that relieves any tension brought about by the unwinding of the DNA strands during bacterial replication."

However, on the sides, it states that it&#

bob-e   580   1 Reply

bio_man

DNA Replication

DNA Replication

Explain why DNA replication is slightly slower in the lagging strand than in the leading strand


thanks!
Hope everyone is having a good weekend 8)

bob-e   757   1 Reply

bio_man

Biotic Factors of The Burrowing Owl

Biotic Factors of The Burrowing Owl

http://www.srd.alberta.ca/BioDiversityStewardship/WildSpecies/Birds/Owls/BurrowingOwl.aspx

After you have read the related article, creat

ghosthunter   5093   1 Reply

bio_man

Spotted Knapweed

Spotted Knapweed

Why does the Spotted knapweed not cause the same damage to its native ecosystem?

ghosthunter   9417   1 Reply

duddy

leukemic cells

leukemic cells

hello there
um i dont know what the roles of leukemic cells are
and why these cells gone cancerous...
plzzz can someone explain these to me?

gangdongwon3   589   1 Reply

bio_man

C-3 plants

C-3 plants

Can you think of a mutation that would help increase the efficiency of carbon fixation in C-3 plants? Explain your reasoning.

shyshy   914   1 Reply

duddy

photosynthesis

photosynthesis

What is the protein that can be mutated to increase the efficiency of carbon fixation in C-3 plants?

This is really confusing. We wanted to say that of the amount of CO2 was increased there could be an increase in efficiency of carbon fixa

rfabb   815   1 Reply

bio_man

Molecular genetics

Molecular genetics

1. Describe 3 situations where complementarity is essential to the survival of the cell.

2. Why is it important that ribosomes are located on the endoplasmic reticulum?


thanks

bob-e   795   1 Reply

sarah!

Cells pt 2

Cells pt 2

Q. If distiller water is transferred to a patients veins in an attempt to replenish the blood lost, what is the probable result of the transfusion?

A. The patients red blood cells will swell bc the blood fluid is hypotonic to the cells.

patsfan22   613   1 Reply

Biology Forums

HW question

HW question

DNA fingerprinting is based on the premise that:

DNA from the same source will be cut the same way by the same restriction enzymes

or

DNA can be separated by size and charge with gel electrophoresis

qb10   600   1 Reply

bio_man

a little help please :D

a little help please :D

im stuck on these questions ..
16.    the laboratory where you work wants to invent a blood vessel substitute. After evaluating both synthetic and natural materials, which would you recommend to be most suitable? Why?
also
innate and

smartie22   654   1 Reply

bio_man

Potato Lab

Potato Lab

hey im doing a lab on the effect of the concentration of sugar in a solution on the transport in a potato.
i was wondering how i would change the percentage of the solute without adding more water? dilute it somehow? or would i just need to chan

needbiohelp!   1246   1 Reply

bio_man

Darwin’s theory of evolution

Darwin’s theory of evolution

Describe how the following items contributed to Darwin’s theory of evolution:

a) his experiences on the voyage of the Beagle

b) Lyell’s Principles of Geology

c) Malthus’s essay about populations

ghosthunter   1212   1 Reply

bio_man

Which of the following is not found in annelids?

Which of the following is not found in annelids?

14) Which of the following is not found in annelids?
A) a hydrostatic skeleton
B) segmentation
C) a digestive system with separate mouth and anus
D) a closed circulatory system
E) a cuticle made of chitin

jimmy   1701   1 Reply

bio_man

enzyme activity

enzyme activity

Iam doing a lab entitled Factors effecting ENZYME Activity. This is part of the chart i have.

TUBE#   pH    Absorbance  Maltose conc.
D1           4     1.29/.76    &nbs

hellomynameis...   1269   1 Reply

bio_man

reproductive barriers

reproductive barriers

Explain how the following situations are reproductive barriers that keep species separate.

a) Species of fireflies use distinctive patterns of fl ashes.

b) Two species of grass flower at different times of year, yet live in the

ghosthunter   1204   1 Reply

bio_man

niches

niches

Many of the endangered species in the world have very specific, or narrow, ecological niches. Explain why species with narrow ecological niches are more likely to become extinct than species with broader ecological niches.

ghosthunter   827   1 Reply

bio_man

photosynthesis and cellular respiration

photosynthesis and cellular respiration

How does energy and matter move through the process of photosynthesis and cellular respiration?  Provide a response that outlines what you know so far about the pathways followed by matter and energy.  You will need to discuss:

w

ghosthunter   3093   1 Reply

bio_man

Match the chloroplast or mitochondrial structure with its function

Match the chloroplast or mitochondrial structure with its function

HIII,
I posted this on yahoo but someone told me to ask here! so i will =)

Match the chloroplast or mitochondrial structure with its function.

A) contains the photosynthetic pigments, reaction centres and electron-transport

HiHeyHello   3610   1 Reply

bio_man

Photosynthesis

Photosynthesis

How can your new knowledge of photosynthesis help to solve world fuel shortages?  Scientists have looked to hydrogen as an alternative clean-burning fuel.  The catch is that hydrogen is not free in nature.  The amount of energy require

HiHeyHello   5887   1 Reply

sarah!

Light-dependent reactions of photosynthesis

Light-dependent reactions of photosynthesis

Hii =)
Just wondering if someone can help me with this question. =D

Summarize in point form the events that take place in the light-dependent reactions of photosynthesis.

HiHeyHello   3520   1 Reply

bio_man

Last electron acceptor.

Last electron acceptor.

Fluorine is much more electronegative than oxygen. Why can't it be used as a last electron acceptor?

amitoj   1092   1 Reply

bio_man

Experiment Errors?

Experiment Errors?

hi, i was wondering if one beaker having a lid while the other beakers did not during an experiment could have affected the experment. Like is there less oxygen in a beaker with a lid or no?
(potaotes placed in beakers of different maltose conce

needbiohelp!   820   1 Reply

bio_man

plz help shona

plz help shona

how does an understanding of the life cycle of these groups of organisms enhance our ability to increase food production? be specific about what we would need to know and apply...

shona   748   1 Reply

bio_man

diploid period of an organism

diploid period of an organism

the life cycle of the common mushroom is a process in which diploid nuclei exist for only a brief period. they are then quickly reduced by meiosis  to a haploid state before the life cycle continues.what does this brief period as a diploid organ

shona   1096   1 Reply

bio_man

Cortisol's target organ?

Cortisol's target organ?

a) liver & body cells
b) liver, fat and muscle


thanks

bob-e   3130   1 Reply

bio_man