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Homework Help: Science: Biology

Recent Homework Questions About Biology

Biology
Which organelle would you expect to find in the cells of a fern, but not in a flatworm? chloroplast **my choice nucleus ribosome mitochondria

Biology
I'm going as this question again as it seems to far down the list to be answered now. Sorry if this is considered spam.

Biology
We are learning about proteins and their structure, but one thing is confusing me. At what structural point is something considered a protein? Is a protein formed after two amino acids synthesis, or is a protein the whole structure (all four levels) put together? I would think...

Biology
Why might it be difficult to classify some molds as unicellular or multicellular? I'm really confused:/ Can somebody please explain this?

Biology
In the classification of eukaryotes, protsists were once placed in a single kingdom. Briefly evaluate whether this classification system is accurate. Why might it be difficult to classify some slime molds as unicellular or multicellular? I know the first one is innacurate, but...

Biology (High school science)
If non-nucleated cells of meristematic tissue are used for tissue culture, then growth rate will be : a) High b) Average c) Very low d) Growth may not take place. Please help!

Biology
What is considered the most critical function of erythrocytes? the transport of oxygen the transport of carbon dioxide buffering against changes in blood pH assisting in clot formation All of the answers are considered the most critical functions of erythrocytes.

Biology
The normal flow of blood through the heart would be right atrium → right ventricle → lungs → left atrium → left ventricle. right atrium → left atrium → left ventricle → aorta. lungs → right atrium → right ventricle → ...

Biology
Systolic blood pressure is the pressure in veins. pressure in major arteries caused by the contraction of the left ventricle. pressure in major arteries when the heart is relaxing. difference in pressure that causes the pulse. hard im thinking its B

Biology
The major vein that delivers blood from the lungs to the heart is the femoral vein. inferior vena cava. superior vena cava. pulmonary vein. jugular vein.

Biology Honors
Hardy-Weinberg: Within a population of birds, 21 percent of them display the recessive phenotype for a particular trait. What are the allele frequencies for this trait assuming the population is in genetic equilibrium? I'm absolutely confused on this ;l

Biology (Please Help!)
When we spin around in one place and stop, we feel as though we are still moving. This feeling is caused by continued Select one: A. transmission of nerve impulses from cochlea to auditory nerve B. movement of fluid against cochlea C. vibrations of tympanum D. movement of ...

Biology
When we spin around in one place and stop, we feel as though we are still moving. This feeling is caused by continued Select one: A. transmission of nerve impulses from cochlea to auditory nerve B. movement of fluid against cochlea C. vibrations of tympanum D. movement of ...

biology
a)what are the main similarities b/n cholera and typhoid? b)what are the main d/ce b/n cholera and typhoid? c)how can the spread of cholera and typhoid be prevented as far as possible?

Biology
Treehoppers have either purple, or green, or white skin. Other geneticists have determined that: (1) whenever one white treehopper is mated with another white treehopper all the progeny are white. (2) whenever two pure bred purple treehoppers are mated all their progeny are ...

biology
When chromatids separate during anaphase two (in meiosis), do all the maternal and paternal chromatids stay together or do they randomly separate into the daughter cells?

Biology i need your help
list the risks of calcium(Ca) for our health.

Science
Please Check! 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical properties can also be ...

Science Please Check
Please Check 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical properties can also be ...

biology assignment
How are cohesion and adhesion properties of water linked to photosynthesis

biology assignment
How are cohesion and adhesion properties of water linked to photosynthesis Assignment: maximum of 3 pages Introduction, main body, conclusion, reference (havard referencing system)

biology
Muscle tissue that is under voluntary control and contains cells with many nuclei is cardiac. skeletal. smooth. cartilage. squamous.

Biology
Which tissue type forms glands? connective epithelial muscle nervous glandular help? hard

Language arts, all right?
(During the break between classes, LEE approaches CHANDRA, who is getting a book out of her locker.) LEE: Hi, Chandra. CHANDRA: Hi, Lee. Are you getting used to this new school yet? LEE (hesitantly): Well, I’m finding my classes all right, but… (whispers) Is it always this...

biology
1.intermediate waters is caused by? 2.deep water currents are important because? 3. water that sinks are? 4.water that rises are?

Biology
Number of ATP by oxidative phosphorylation from a 24 carbon fatty acid? I have 96 because fatty acids go to CoA (2ATP) and the Krebs (22ATP). Glucose has 6C and so you add 2+22ATP and multiply by 4 to get 96. Is this right? If not, how do I figure this out?

Biology
How much ATP energy would you get from a tripeptide that, upon hydrolysis and deamination, makes two acetyl CoA and one pyruvate molecule and undergo aerobic respiration?

biology
what type of cell recognizes cells that have been infected by viruses because the infected cells have viral proteins on their surfaces?

Biology
Compare and contrast between these two plant polysaccharides : starch and cellulose.

Biology
How do I set up a trihybrid punnett square if the cross is TTRRPp x TtRrPp?

Biology
Why do we use dna primer for PCR but RNA primer for dna polymerase in cells

biology
It was observed that due to poor nourishment the average weight of beetles reduced. If this continues in a number of generation, will this feature direct evolution? Explain

Biology
Multicellular organisms use a variety of communication methods to coordinate cell function. Choose ONE of the following examples below and describe the cell-to-cell communication that occurs, and then describe the types of responses that result from this communication. ...

Biology
Define a protein kinase and explain its role in a signal transduction pathway. Then describe what can happen if an organism's cells experience abnormal protein kinase activity.

Biology
Describe the G protein receptor system and the tyrosine-kinase receptor system. Explain how these two systems are similar and how these two systems are different, in terms of structure and function please.

Biology
The Hershey-Chase experiment proved that DNA was the hereditary material because a- radioactive phosphorus in viral proteins was shown not to enter bacterial cells. b- radioactive phosphorus in viral DNA was shown to enter bacterial cells. c- radioactive sulfur in viral ...

Biology
I have a research article about the early advancement of laying times for Flycatchers, a bird species through Europe and Asia. My variables are: - Annual temperature recordings in each study site - The species, flycatcher - Clutch size of the flycatchers - The location of each...

Biology - Evolution
Suppose you grabbed ten seeds from the large number of seeds that were present and planted them in a garden. During the summer you harvest 100 bean seeds from these 10 groups of plants? Would you wee the same distribution of seed size as when you first planted the seeds? ...

Biology
I need help creating a pedigree using this description: Lily is 28 years old. She has a younger brother Nick who has hemophilia and a younger sister, Sharon. Lily's parents are George and Maureen. George has a older brother named Edward and a older sister named Rachel. George'...

Biology
How do ATP and ADP function in capturing and releasing energy?

Biology
Describe what you observed in the hands-on animal behavior lab. What conclusions did you draw from the data? Explain your answer.

Biology
Describe a specific type of chemical or audible communication used by animals to respond to an external stimulus and the resulting change in behavior. Explain how this type of communication may relate to natural selection within a population.

Biology
In one signaling pathway, cyclic AMP (or cAMP) acts as a second messenger in a series of reactions that result in the relaxation of smooth muscle cells in artery walls. Define cyclic AMP and describe the role and properties of a second messenger. Then explain how a medication ...

Biology
Multicellular organisms use a variety of communication methods to coordinate cell function. Choose ONE of the following examples below and describe the cell-to-cell communication that occurs, and then describe the types of responses that result from this communication. ...

Biology
Define a protein kinase and explain its role in a signal transduction pathway. Then describe what can happen if an organism's cells experience abnormal protein kinase activity.

Biology
Explain how cell membranes and their components participate in intercellular signaling. Give a specific example of cell membrane involvement in one particular type of cellular signaling.

Biology
Describe the G protein receptor system and the tyrosine-kinase receptor system. Explain how these two systems are similar and how these two systems are different, in terms of structure and function please.

Biology
The single defining characteristic of the mammals is the presence of? mammary glands. a placenta. hair. warm blood. a skul

Biology
1.,you drink salty beverages (clams to) and eat pretzels all day. At the end of the day your weight is way up. Why? I think it has something to do with the fact that our cells shrink in size ? I have no clue? 2. Athletes drink Gatorade . Why? Given the description, tell the ...

Biology
1.,you drink salty beverages (clams to) and eat pretzels all day. At the end of the day your weight is way up. Why? I think it has something to do with the fact that our cells shrink in size ? I have no clue? 2. Athletes drink Gatorade . Why? Given the description, tell the ...

Biology
What can happen to our virtual finch population if the weather changes between wet and dry conditions too rapidly? A- The mutation rate may fall to zero. B- The distribution of beak sizes may cease to be bimodal. C - The finch population may go extinct. D - Beak size may cease...

Biology
Why is coelom considered to be an evolutionary advantage

Biology
A person in Flint Michigan, has severe DNA damage due to heavy metal comtaminated water and the person is still alive. The doctors are now seeing tumors develop. Give two reasons, related to tumor suppression, DNA replication or some other topic covered to date in this class ...

Science/Biology
the vessels that contain the largest volume in the vascular system are? I think Arteries

biology
I got a biology project that's about the excretory system & I have to write the word excretory & draw pictures inside of the word that compares it to real life. What pictures can something be compared that involves with the system?

biology
given the inefficiency of two of the pathway shown in figure 9-4 what advantage could there be to using these pathway to produce energy?

Science/biology
A 62 year old man experiences sudden onset of difficulty breathing, followed by double vision, and later by abnormal kidney and liver function tests. Of the following conditions, which is most likely the cause of his problems? A. Vasculitis​​ B. Raynaud's ...

biology
hi. I would like to know in reference to wind and insects moving pollen to different species of flowers at the same time, why doesn't pollen in one species fertilize egg of a second species thus forming hybrids?

biology
the amount of energy needed to start two reactants to form a product is?

SCIENCE
jamal's neighbor tells him that there are more bacterial cells than human cells in his body. which of these is the best reason that jamal should question his neighbors statement? a. jamal is older than his neighbor b. jamal does not like his neighbor very much. c. his neighbor...

Science Help
jamal's neighbor tells him that there are more bacterial cells than human cells in his body. which of these is the best reason that jamal should question his neighbors statement? a. jamal is older than his neighbor b. jamal does not like his neighbor very much. c. his neighbor...

BIOLOGY - HELP URGENT!!!!
How do the following terms relate to one another with respect to a single genetic locus? - Wild Type Allele(s) - Mutant Allele(s) - Gene Product(s) - Population - Genotype - Phenotype - Dominant Allele - Recessive Allele - Individual - Number of different alleles

Very quick question biology
I'm working on a biology project where I must make a molecule of glucose. I have finished my molecule but I want something in the middle of it which is the "centrepiece ". Can anyone give me any ideas of some things glucose is found in (food) in which I could easily find the ...

Science
1. How does nanotechnology how engineers make products for the future? A. By changing a materials atomic structure, it can be made from elements that are easier to obtain. B. By changing a materials atomic structure, it's physical properties can also be changed. C. By changing...

biology
A positive control group contains the dependent variable under study. true or false i guess it's true

Biology please assist
1. Where is pH found? 2.what is the function of pH? 3.what principle guides the phenomenon of pH? 4.what is acid rain ?how is it related to pH values?

Biology
Draw map of nigeria and indicate the local biomes in the different state

biology
In which part of the body are the crypts of Lieberkuhn?

Biology - Please check?
How does artificial selection differ from natural selection? (Free response) Here is what I wrote: While both of these selections have to do with breeding, artificial selection (same as selective breeding) is where either plants or animals are intentionally bred for scientific...

Biology
1.) Prophage occurs when a.) It bonds with carbohydrates to create a virus b.) Bacteriophage DNA embeds itself in host DNA c.) It detaches from carbohydrates to create a virus. d.) Bacteriophage DNA detatches itself from host DNA. D.

science/biology (cladogram)
How would a scientist use DNA or protein sequences from three different organisms to construct a cladogram? don't understand this how do I write this???? help!!!!

Biology
MEIOSIS 1)name the process unique to meiosis that occurs during bivalent formation that may increase genetic diversity? 2)how are sister chromatic made and what is the structure that holds them together? 3)what do we call package of genetic information (DNA), encoding a ...

Biology
How do mutations that alter the nucleotide sequence of a promoter influence the original function of that promoter and thus the entire cell? (Try to name all the biological consequences of possible mutations in the promoter.)

Biology help!!
what compounds (fats, starch, protein and simple sugar) do the following foods have? Oatmeal Margarine Salmon Whole milk Chocolate chip cookies Peach

Study Guide
Does anyone know where I could find an online or PDF version of the Holt Biology 2004 study guide?

Biology
what compounds (fats, starch, protein and simple sugar) do the following foods have? Oatmeal Margarine Salmon Whole milk Chocolate chip cookies Peach

Biology
what compounds (fats, starch, protein and simple sugar) do the following foods have? Oatmeal Margarine Salmon Whole milk Chocolate chip cookies Peach

Biology
In what way are bacteria and fungi similar? Ecological function Cell wall components Design of the nucleus Ribosome structure help

Biology
bond that holds atoms together in a molecule are... A.radiation energy B. kinetic energy C. thermal energy D. potential energy

Biology
which nucleic acid statement is true? A. mRNA codes for DNA B. mRNA codes for protein C. tRNA makes amino acids D. tRNA makes lipids I think B

biology
Pepsin is... A. enzyme B. lipid C. carbohydrate D. nucleic acid I think A!

Biology
key factor driving cellular differentiation in the body? A. rate of transcription B. cell nutrience C. expression of genetic coding D. chemical gradients in a cell environment I think A

Biology
DNA can copy itself easier than RNA because? A. its a double helix B. polymer of nucleotide C. its confined to nucleus D.its supported by histone proteins I have no idea

Enriched science
What is the goal of synthetic biology? A. The goal of synthetic biology is to mimic living cells B. The goal of Synthetic biology is to generate new tissues to replace damage tissues C. The goal of synthetic biology is to engineer living cells to perform specific functions D. ...

Biology
Which nucleic acid statement is true A. mRNA codes for DNA B. mRNA codes for proteins C. tRNA makes amino acids D. tRNA makes lipids I think B

Science
I'm really bad at Biology and Science in general. Chemistry and Physics will be difficult for me because I'm not good at the Science branch even though I study and work hard for Science/Biology. What can I do to improve?

Directions help (Biology)
I have to do a research paper for my biology class, and I'm having a hard time understanding what to exactly write about. The directions are written way different then how my teacher has ever addressed anything, I emailed her for clarification but it doesn't seem like she will...

biology
What kind of molecule forms the sodium-potassium pump? Genuinely in need of the answer to the question.

biology
How is molecular weight related to the size of a molecule? Genuinely in need of the answer to the following question. Thank you.

Biology (Animal)
How is molecular weight related to the size of a molecule?

Math,english,further math,government,CRS,lit in english,yoruba,civic,agric,biology
The fourth and sixth term of an arithmetic progession are -4 and -10 respectively. Find A.the common difference B.the first term C.sum of the first twelve terms

Biology
How are the following terms related to the process of transcription and one another? Eukaryotes, Prokaryotes, membrane-bound nucleus, introns, exons, precursor RNA (pre-mRNA), mature RNA, heterochromatin, euchromatin, and structural gene.

Biology ASAP
What is the scientific name ( genus and species level) of star fish, jelly fish, silk spider, mouse, and earth worm

biology
Picture true of false The atom shown in the diagram has 4 energy levels or shells. 2. The atom shown in the diagram above has a total of 5 electron orbitals. 3. Each energy level consists of 2 or more orbitals. 4. The second energy level consists of 4 electron orbitals. 5. ...

biology
The atom shown in the diagram has 4 energy levels or shells. true or false

Biology
How can I describe the following things about water in sketches or drawings? please give me ideas 1.High heat capacity 2.High heat of vaporization 3.Water is a solvent 4.Water molecules are cohesive and adhesive 5. Frozen water is less dense than liquid water 6. Water has a ...

Biology
Which is an example of a population? all the squirrels in North America and Europe all the species of organisms in one state all the rose bushes around the world all the sugar maple trees in a state park

Biology /science
How can I describe the following things about water in sketches or drawings? please give me ideas 1.High heat capacity 2.High heat of vaporization 3.Water is a solvent 4.Water molecules are cohesive and adhesive 5. Frozen water is less dense than liquid water 6. Water has a ...

Biology
How can I describe the following things about water in sketches or drawings? please give me ideas 1.High heat capacity 2.High heat of vaporization 3.Water is a solvent 4.Water molecules are cohesive and adhesive 5. Frozen water is less dense than liquid water 6. Water has a ...

Earth Science
What are the two most common minerals located in Earth's crust? (A. Feldspar and quartz) B. Iron and copper C. Diamonds and gold D. Salt and saline Climatology is a subspecialty of A. environmental science. B. oceanography. (C. meteorology.) D. marine biology.

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Homework Help: Science

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