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March 28, 2017

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Number of results: 35,608

Genetics
Describe the inheritance and expression of cystic fibrosis, Tay-Sachs disease and sickle-cell anemia. I didn't understand what the question meant by "expression." Please help!
February 24, 2008 by Anonymous

Biology
Unit of measurement that scientists use to determine the diameter of an animal cell is the 1 - millimeter 2 - micrometer 3 - nanometer 4 - meter I am stuck on this question, but I believe it is #3 nanometer
March 10, 2008 by Sarah

chemistry
The reduction potentials for the species involved in an electrochemical cell are as follows: M+ + e– --> M is 0.30 V J+ + e– --> J is 0.40 V. All solutions are 1.00 M and J+ / J is connected to M+ / M. What is Ecell (in V)? Which species is easier to oxidize? The ...
May 12, 2008 by so confused

Chemistry
In every electrolytic and galvanic (voltaic) cell the anode is that electrode (A) at which oxidation occurs. (B) which attracts cations. (C) at which electrons are supplied to the solution. (D) at which reduction occurs.
May 12, 2008 by LT

Inorganic chemistry
The following electrochemical cell has the potential of +0.617V at 25 degrees Celsius Pt ! H2(g, 1.00 atm) ! H+ (aq, 1.00M !! Ag^+(aq) ! Ag The standard reduction potential, E naught, of Ag^+ = 0.799V. What is the Ag+ concentration?
April 11, 2009 by Steve

biology
Which of the following are NOT used to classify kingdoms of organisms? a. complexity of the organism b. invertebrate or vertebrate c. method of obtaining nutrition d. type of cell that makes up the organism D?
May 7, 2010 by Pamela

Chemistry
Calculate the cell emf (in volts) for the following reaction at 25°C: Ni(s) + 2 Cu2+(0.010 M) → Ni2+(0.0010 M) + 2 Cu+(1.0 M) [Enter only the number of your answer.] Answer
November 15, 2010 by Diana

Chemistry
What is the unit cell of calcium sulfide? anti-fluorite cesium cholride diamond fluorite graphite rutile sodium chloride zinc blende
May 2, 2011 by Lala

11Science
A diploid organism has five pairs of chromosomes in each somatic cell. Assuming that no crossing over occurs, how many genetically distinct gametes can this organism produce?
February 15, 2012 by Rebecca

biology
6. During division in cellular reproduction, the DNA and cytoplasm of the parent cell is distributed to two A. chromosomes. B. clones. C. simplified cells. [D. daughter cells.]
October 3, 2012 by jake

geometry
sodium has a body-centered cubic structure with a unit cell that is 430 picometers wide. estimate the radius of a sodium atom. please help me, I don't know how to get the solution. THank you
January 28, 2013 by lin

human biology need help
The Golgi body receives proteins from the (A) __________, "packages" those proteins and "ships" them to other areas of the cell, or to the (B) ________ for secretion.
March 11, 2014 by Ann

human biology please help
The Golgi body receives proteins from the (A) __________, "packages" those proteins and "ships" them to other areas of the cell, or to the (B) ________ for secretion.
March 11, 2014 by Ann

Neuroscience
Consider two ganglion cells with cell bodies that are adjacent to each other in the retina. Their receptive fields are 1. overlapping 2. border each other 3. nearby but do not touch
November 26, 2014 by qwerty

chemistry
Calculate the specific rotation for Compound A, whose observed rotation was (+) 45.0 for a solution made from 0.400 g dissolved in 5 mL of chloroform solvent. The cell path length was 10 cm.
February 18, 2015 by khushboo khan

college chemistry
How did the change in concentration of the copper ions affect the cell potential? Is this change in agreement (qualitatively) with that which would be predicted by LeChatelier's Principle? explain.
May 19, 2015 by Anonymous

chemistry
How many minutes does it take to form 10L of O2 measured at 92.2 kPa and 28°c from water if a current of 1.3 A passes through the electolytic cell? a) how many minutes? b)What mass in grams of h2 forms?
December 2, 2015 by Peggy

Chemistry
How many minutes does it take to form 10L of O2 measured at 92.2 kPa and 28°c from water if a current of 1.3 A passes through the electolytic cell? a) how many minutes? b)What mass in grams of h2 forms?
December 2, 2015 by Peggy

Science
1.How is science & society related? i have no idea what the answer to this question is 2. What is a scientist's usual next step if data supports a hypothesis? can you tell me if i'm right?... i think that they either published or the experiment is repeated. If data support the...
August 21, 2006 by Leslie

Chemistry
Consider the voltaic cell: Zn(s) / Zn2+(aq) // H+(aq) / H2(g) / Pt(s) Calculate the value of Ecell, in V, when [Zn2+] =1.00 M and [H+] = 0.00100 M DATA: Zn2+(aq) +2 e¯ ---> Zn(s);Eo = - 0.76 V 2 H+(aq) + 2 e¯ ---> H2(g);Eo = 0.00 V
June 19, 2011 by Martin

Biology
When looking at a sample of blood for White Blood Cell's, what could you do to reduce interference from Red Blood Cells?
February 4, 2012 by KJack

chem
the volume of a certain bacterial cell is 1.39um^3. what is its volume in mm^3? what is the volume of exactly 1e4 cells in liters
September 8, 2014 by jasmine

advanced chem
Calculate the standard cell potential at 25 ∘C for the reaction X(s)+2Y+(aq)¨X2+(aq)+2Y(s) where ƒ¢H∘ = -653 kJ and ƒ¢S∘ = -263 J/K .
April 22, 2016 by chyenne

Conceps of development
Which of the following is the crux of the interrelationship between mathematics and science? A. About half of the basic math concepts are related to science concepts. B. The basic concepts of mathematics are the basic process skills of science. C. Basic mathematics process ...
January 22, 2015 by Daniella

concept development
Which of the following is the crux of the interrelationship between mathematics and science? A. About half of the basic math concepts are related to science concepts. B. The basic concepts of mathematics are the basic process skills of science. C. Basic mathematics process ...
January 25, 2015 by Daniella

Biology/Chemistry
What kind of isomers can amino acids form? Which isomer is present in most living organisms? don't major compounds of living organisms consist of modifications of hydrocarbons Although D amino acids can be found in nature, only the L isomers are used to form proteins. The D ...
February 21, 2007 by Raj

Math
Jared bought a cell phone for $42. Juanita spent 1 1/2 times as much. How much did she spend? Thank you very much!
October 14, 2016 by Tan

Biology
-Rank the following terms from simplest to most complex: cells, organelles, organs, tissue, organism. -If a cell is like a school, then the nucleus would be...? -Which organelle serves as a "workbench" for the ribosomes?
December 4, 2008 by Astrid

Calc
The volume of a growing spherical cell is given below, where the radius is measured in micrometers (1 µm = 10-6m). V = 4/3pi r^3 (a) Find the average rate of change of V with respect to r when r changes from 2. Evaluate your answers numerically. (i) 2 to 5 µm ? µm^2 (ii) 2 ...
November 3, 2009 by Josh

biology
lipid soluble must be oxidized before they are excreted from.otherwise the toxins would not be able to pass through the a)bowman capsule b)red blood cells c)cell membranes d)cytoskeleton
July 22, 2011 by kb

Biology
Which of the following is true for the nucleus? A) It has no definite structure B) It is surrounded by membrane C) It is the eukaryotic cell's energy-producing organelle D) It is closely associated with the Golgi apparatus. E) It is always bluish purple in colour
January 11, 2016 by S

biology
1) Gene regulation in eukaryotes a) usually involves in operons b) is simpler than in prokaryotes c) allows for cell specialization d) includes the action of an operator region i think its C can you please explain to me why it is c or why it isnt if i got it wrong? thank you.
December 6, 2016 by carma

Chemistry
will a red blood cell undergo crenation, hemolysis, or no change in each of the following solutions? 1% (m/v) glucose 2% (m/v) NaCl 5% (m/v) NaCl .1% (m/v)NaCl
May 9, 2011 by Curlyqty

Biology
What are the three reaction pathways which pyruvate undergoes in the metabolic pathways inside the cell and what are the names of the final products of each of these pathways?
October 26, 2011 by Tommy

math
an element has a BCC structure with cell edge of 288pm. the density of the element is 7.2g/cm3. how many atom are present in 208g of the element?
January 1, 2013 by ahamad sultan

6th grade science
I need help. Quick.I need an idea on how to do a science project that has to have somthing to do with types of energy,atmopsphere or life science. I only have 2 more weeks left. I need an idea. thanks :)
May 3, 2010 by gill

6th grade science
I need help. Quick.I need an idea on how to do a science project that has to have somthing to do with types of energy,atmopsphere or life science. I only have 2 more weeks left. I need an idea. thanks :)
May 3, 2010 by gill

human biology
if a cell lacks ATP, which of the following processes would cease to operate immediately? diffusion Na+/K= pump facilitated diffusion osmosis or passive transport
March 18, 2007 by sophia

chemistry
The reduction potentials for the species involved in an electrochemical cell are as follows: M+ + e– ==> M is 0.10 V J+ + e– ==> J is 0.30 V. All solutions are 1.00 M and J+/J is connected to M+/M. 1. What is Ecell (in V)? 2. Which species is easier to oxidize? 3. ...
April 21, 2008 by Lily

biology
With regard to bringing solutes into the cell across the plasma membrane, discuss the advantages and disadvantages of diffusion, facilitated diffusion,active transport,and endocytosis.
September 22, 2011 by Anonymous

chemistry
How do you calculate the theoretical cell voltage? 1) Zn|Zn^+2 (1M)| Cu|Cu^+2 (1M) 2) Cu|Cu^+2 (1M)| Zn|Zn^+2 (1M) 3) Fe|Fe^+2 (1M)| Cu|Cu^+2 (1M) 4) Zn|Zn^+2 (1M)| Cu|Cu^+2 (0.1M) 5) Cu|Cu^+2 (1M)| Cu|Cu^+2 (0.1 M) Now 4 and 5 have different moles how do you calculate those ...
July 19, 2012 by fenerbahce

Psychology
To measure the relationship between age and cell phone use, a researcher should use a Correlation Central tendency A histogram Standard deviation A t test
November 1, 2012 by yal

chemistry
calculate the theoretical potential of each of the following cells.is the cell reaction spontaneous as written or spontaneous in the oppsite direction? Bi|BiO+(0.04M),H+(0.2M)||I-(0.1M),AgI(sat`d)|Ag help meeeee
March 12, 2013 by fahad

Anatomy and Physiology
A eukaryotic cell in a human body has just reproduced assexually. Which of the following has mostl likely just occurred? A. Metastasis B. Fertilization C. Mitosis D. Meiosis
February 3, 2014 by Diana

Math
How can i Describe how the products of the light phase of photosynthesis are used to form a glucose molecule and how this molecule is broken down in the cell of a plant to release energy. Thanks in advance
May 16, 2015 by Jonase

life sciences
Describe how the products of the light phase of photosynthesis are used to form a glucose molecule and how this molecule is then broken down in the cell of a plant to release energy
July 17, 2016 by Sharon

BIOLOGY!! TEST TOMORROW!!!
Whats the difference between adrenaline and noradrenaline??? Any help would be appreciated!!! That's a fair question. We'll tackle the simple part first. In North America, we refer to the two compounds as epinephrine and norepinephrine while in the UK they're referred to as ...
March 5, 2007 by stressed student

Chem
Given: Al3+(aq) + 3e–  Al(s); E° = –1.66 V Cl2(g) + 2e–  2Cl–(aq); E° = 1.36 V What is ∆G° for the following cell reaction? 2AlCl3(aq)  2Al(s) + 3Cl2(g)
May 3, 2010 by Anonymous

chemistry
is there a typo to this cell notation answer Au(s)|AuCl4-(aq), Cl-(aq)|| F2(g)| F-(aq) |Pt(s) If i look at the anode, should Cl- stay on the side of Au not AuCl4- Au + 4Cl- yield AuCl4- + 3e
November 30, 2010 by flame

calculus
The base of a cell phone tower is an equilateral triangle with sides 10 ft long. How far is one corner of the triangle from the center of the of the triangle?
December 9, 2012 by Jackie

science
In science, my question is What is the volume of a pea? 1)What does pea means? i think it is a fruite, buut i am not sure.. 2)I forgot what volume means in science. 3)i don't know what to do. AND 4)I NEED HELP!!!!!!!!!!
October 2, 2008 by Carly

Science/Biology
Pick the BEST answer: A)Which Of The Following Is An "Excitable Cell"? <4>1) Neuron <3>2) Electron <4>3) Hormone <3>4) Both 1 & 2 <4>5) All Of The Above B)What Is The Popular Molecule That Energizes Many Activities In Cells? <4>1) Adenosine ...
December 11, 2007 by Biomed

biology
True or False: The multi-cellular stage in the life cycle of a fungus is haploid. http://staff.jccc.net/PDECELL/celldivision/lifecycles.html#fungi Yes, true. And to make it more interesting, there is a species of fungi that live in symbosis with orchid seeds (which have no ...
March 8, 2007 by bio

Microbiology
PLEASE HELP I AM NOT SURE WHAT THE CORRECT ANSWERS ARE: I have guessed them please let me know if they are correct. 1. The LEAST likely microbe to be used as a biological weapon would have which of the following characteristics? a. spread by insect vectors b. spread by ...
March 21, 2016 by J

Science
Over a one-week period, there is a rapid increase in the number of patients entering the emergency room complaining of high fever, lethargy, muscle aches and diarrhea or vomiting. Which method of scientific inquiry would the doctors use to determine the root cause of the ...
August 2, 2011 by dannytan2

how concepts develop
Which of the following is the crux of the interrelationship between mathematics and science? A. About half of the basic math concepts are related to science concepts. B. The basic concepts of mathematics are the basic process skills of science. C. Basic mathematics process ...
January 15, 2015 by Daniea

Mathematics, geography, agricultural science, life science, English, Life orientation And sepedi
I'm doing grade 11 but still I don't know what or which kind of job careers that needs these subjects Agricultural science, Geography, life science, mathematics (pure), Sepedi, English, And lastly life orientation..Help me please and appreciation will bless you.
March 1, 2016 by tebogo aka sleigh fish

Science
I have a science exam tomorrow for 9 Space Science. I was wondering if you could help me find free practice exams, tests or questions to review for my exam. We have no way of knowing what your exam will cover. Your best bet is to review your own text, notes, and handouts.
June 20, 2007 by Sarah

Chemistry
An element has a body centred cubic structure with edge cell of 288 pm .The density of the element is 7.2 g/cm3.How many atoms are present in 208g of the element.
November 8, 2012 by Raynold

Science 8R
What is Combustion? this is not homework (please give me a good definition for 8th graders like me to understand) BTW - I'm creating a study guide for the NYS Science Test I'm taking at the end of the year. We started taking notes in my science class that we can use to study ...
February 3, 2013 by Laruen

law
hi, im having trouble thinking of my own laws. can someone help me out. thank you very much. Some examples: Cell ban in cars, raising lowering an age limit (driving, voting retirement etc.)
September 17, 2007 by shawn

Inorganic chemistry
Given the following two half-reactions, determine which overall reaction is spontaneous and calculate its standard cell potential. Cd^2+(aq) + 2e^- ==> Cd(s) E naught = -1.21V Sn^2+ + 2e^- ==Sn(s) E naught = -0.14V
April 11, 2009 by Steve

Business
What are the different devices used to communicate in businesses?? already have: instant messaging, cell phones, e-mail,online conferencing, video call, voice mail.
December 3, 2009 by clueless

Chemistry
An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 3.5 Angstrom, and the density of the crystal is 7.39g/cm^3. Calculate the atomic weight of the element. A= ? g/mol
May 3, 2010 by Anna

English
Are these two sentences grammatically correct? 1)I recharge my cell phone once a day and I top it up once a month. 2)Computer's work is more accurate thna humans'.
December 22, 2010 by Franco

chemistry
Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell - it helps.)
April 3, 2013 by adex

chemistry
Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell - it helps.)
April 4, 2013 by adex

Anatomy & Physiology
A eukaryotic cell in a human body has just reproduced assexually. Which of the following has mostl likely just occurred? A. Metastasis B. Fertilization C. Mitosis D. Meiosis MY ANSWER IS B
January 23, 2014 by Diana K

Biology
What type of cell does our brain use to control muscle movement? A)sensory neurons B)retinas C)synapses D)motor neurons I think the answer is D, but I'm not 100% sure.
February 16, 2014 by Isabella

Biology
Please Explain thoroughly. A cell exists in a solution of 10% salt and has an internal concentration of 90% salt. Draw this scenario. Label its tonicity. Show where water would flow.
March 6, 2014 by Drake

Chemistry
What are the three essential parts to make a battery? Cell reducing agent acid fuse porous barrier or salt bridge voltage regulator oxidizing agent
May 14, 2014 by Karen

math
a quality supervisor for a factory that makes cell phone cases examines a sample of 46 cases are the wrong size in a shipment of 3,000? A)410 B)475 C)506 D)522
June 5, 2014 by plz help its my last test or i will fail a grade :

7th Grade Math
You are saving money to buy a new cell phone. You begin with $20.00 and save $4.00 each week. Write an expression for the amount of money saves after w weeks.
October 22, 2014 by Adrienne

Chemistry
A solution of 4-methyl-3-penten-2-one in ethanol shows an absorbance of 0.52 at 236 nm in a cell with a 1-cm light path. Its molar absorptivity in ethanol at that wavelength is 12,600 M^-1 cm^-1. What is the concentration of the compound?
February 11, 2015 by Ryan

Chemistry
A solution of 4-methyl-3-penten-2-one in ethanol shows an absorbance of 0.52 at 236 nm in a cell with a 1-cm light path. Its molar absorptivity in ethanol at that wavelength is 12,600 M^-1 cm^-1. What is the concentration of the compound?
February 11, 2015 by Ryan

Math
At & T has a cell phone plan of $25.00 a month plus 30 cents per minute. There is a one year contract wit a new phone for $19.99 Can someone put this into a equation for me.
March 7, 2015 by Jessica

Biology
I would like some help if that is OK, like soon!:) 1.) A group of scientists proposes an idea that a chemical compound will enable bean plants to grow faster. They grow one group of bean plants in the presence of the compound and another group in the absence of the compound. ...
September 19, 2016 by Jessica

Language Arts help please
Choose the word(s) that the italicized phrase modifies or describes. 1. According to this map, the smallest region in the United States is New England. (*is New England* is italicized) map smallest region Unted States 2. DynaTAC800X, the nation's first cell phone, was ten ...
November 18, 2013 by Charlotte

PNU
An element has a body-centered cubic(bcc) structure with a cell edge of 288pm the density of the element is 7.2g/cm3. How many atoms are present in 208g of element
February 17, 2015 by abeer

Social Stuides
What were some inventions that were inspired by the telephone? I've already got computer, please don't say another phone like the cell phone and smart phone. Thanks!
September 30, 2015 by Jack

SCIENCE
I have to find research about Jan van Helmont's work on Spontaneous Generation and I am having trouble finding info. about it and how he conducted the experiment..also i have to figure out the strengths and weaknesses of the experiment and is it considered good science or bad ...
May 24, 2008 by Amanda

Early Childhood Education
Karen asked, "Where does rain come from?" The best response for her teacher is: A. "The clouds." B. "I don't really know, Karen." C. "How could we find out where rain comes from?" D. "That's really hard to understand, Karen." I think it's c Mrs. Bates watched David work a ...
December 11, 2013 by Hayley

real estate
Let’s see if you can solve this puzzle. Billy and Elizabeth still work for the same brokerage. Billy is in a meeting with a buyer client in one room, while Elizabeth is in a meeting with the seller client in the next room. Elizabeth’s client is selling the property that ...
February 23, 2017 by emma

biology
1. explain that not all cell genes show simple patterns of dominant and recessive alleles. 2. explain how to identify th blood types of an offspring. 3. discuss how gender in humans is determined.
February 10, 2012 by diane28

biology/ help please
which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon
April 8, 2013 by joy

biology/ help please
which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon
April 8, 2013 by joy

business stats
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that: (Use the poisson approximation to the binomial.)
July 7, 2014 by Beth

Art
Animation has changed from each scene cell being drawn by hand to entire worlds being created on a computer. This is an example of....... A. innovation B. aesthetics C. expression D. creativity I think A am I correct?
August 26, 2014 by Amber

Chemistry
An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 3.13Å , and the density of the crystal is 7.78g/cm3. Calculate the atomic weight of the element. Please help, thanks
September 14, 2014 by Joe

Science
What would be the definition of the word science through a 7th graders eyes?
September 4, 2007 by Dillon

science
Im doing a science fair project on how fertilizer and sun effect the growth of grass
September 13, 2007 by bryan

science
I am doing a science project on density and buoyancy. What would be a good hypothesis for this topic?
January 19, 2008 by shay

science
I really need some help...so please give me an acrostic for the word; "science"
June 11, 2008 by crhris

science
i am doing a science project and i need to kno how flares work, and what the ingredients are. can someone help me?
May 3, 2009 by logan

science
Why do many science instructors suggest that younger students cannot develop adequate hypothesis
September 11, 2009 by Anonymous

Science
I am doing a science fair project could you tell me some information on paper towels?
January 19, 2010 by Jalen

science
define the following 1.science 2.technology 3.innovations 4.measurement 5.international system or S.I
June 16, 2010 by april

science
This question is not a science queston though, but have you watched the movie AVATAR
July 12, 2010 by Ted

science
i need to preapare a project on science .... any sort of experinment.... what can be done that is intresting and then easy....
January 7, 2011 by sanyukta

science
need a science project for 7th grade using toy train.
January 29, 2011 by mateo

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