Recent Homework Questions About Biology
An instructor for a college biology lab has each of her 12 students (you are one of those 12 students) take their own SRS of 25 plants from an experimental field. She lets you know that the heights (measured in cm) of the plants in the field follow a N(50,4) distribution. a. ...
Wednesday, July 11, 2012 at 10:03pm
The digestive, circulatory, respiratory, immune, and excretory systems all work together to maintain homeostasis. Discuss how a minor malfunction in one of these systems could lead to major malfunctions in others. If methods were developed to improve the efficiency and ...
Monday, June 25, 2012 at 6:23pm
The function / effectiveness of an enzyme can be disabled by the slightest change in the sequence of its proteins. What prevents an enzyme from performing its functions in the event that its protein sequence is changed?
Thursday, June 21, 2012 at 9:01am
When a grouse eats berries, the berry seed are eliminated as waste materials and may be dropped in another part of the forest where they may sprout and eventually grow into new berry plants. How would you classify the symbiotic relationship between the berry plant and the ...
Thursday, June 21, 2012 at 8:47am
Is Wind Power Green? I am writing a paper and I need to put together an outline of my final paper. I would just like to know if the following paragraph I have put together can serve as a thesis statement? "The idea that the world is reaching a possible peak in oil ...
Sunday, June 17, 2012 at 4:49pm
Can you please show me how to answer this question using C1V1=C2V2 A scientist receives a vial containing a protein at at concentration of 35mg/ml and is asked to add 0.25ml of it to 6.75mls of Biuret solution. What is the concentration of protein in the Biuret solution in mg/ml?
Sunday, June 17, 2012 at 10:34am
Which of the following are three common characteristics of echinoderms? A tube feet, circulatory system, body symmetry B marine-dwellers, endoskeletons, water-vascular system C bilateral symmetry, ossicles, respiratory system D mouths, protosomes, body symmetry is it C...
Thursday, June 14, 2012 at 4:32pm
Growth by cell division that makes both ends of a plant longer but not wider is called A secondary growth. B annual ring growth. C vascular growth. D primary growth. is it D? thanks
Wednesday, June 13, 2012 at 12:12pm
Could you please check scientific English in this short dissertation? Thank you, Ms. Sue. 1) Conrad Waddington introduced the term epigenetics in the early 1940s. He defined epigenetics as the branch of biology which studies the causal interactions between genes ...
Thursday, June 7, 2012 at 6:52pm
In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 16% of your total grade, each major test is worth 21%, ...
Sunday, June 3, 2012 at 1:39pm
biology i need help urgent
what characteristic distinguishes arthropods from other invertebrates? a. the colem b.the endoskeleton c.jointed appendages d.bilateral symetry
Wednesday, May 30, 2012 at 9:51am
Which is the correct direction of blood flow? a) right atrium --> right ventricle --> pulmonary artery b) right atrium --> left atrium --> pulmonary artery c) left ventricle --> pulmonary artery --> aorta d) left ventricle --> left atrium --> aorta
Monday, May 28, 2012 at 8:15pm
The Kingdom Monera has been separated into two domains, the Archaea and the Bacteria. Which of the following was most important in prompting scientists to change the way these organisms were classified? a.)Major differences were discovered in the structure and operation of the...
Sunday, May 27, 2012 at 5:48pm
Need help with FOV area (mm2) totally confused? im confused i have the FOV diameter they are: 4x = 5 10x = 2 40x = 0.5 a classmate told me she thinks the area for 40 x is: pi(5/2)^2 = 19.6 not sure if thats true or how to do it for the low and medium, magnification. please ...
Tuesday, May 22, 2012 at 3:33pm
- "problems that result as blood alcohol concentration increases" Basically, I'm supposed to put what page number the answer is on, and then what the answer is. I have the page number, yet the answer is no where on the page to be found. I've read it over ...
Tuesday, May 22, 2012 at 5:16am
I wrote an essay because i'm apply to get into the honor's program. I'm supposed to write about who i was, who i am now, and who I would like to be. I would appreciate it if I got some feed back along with grammar correction. Is my essay even close to being okay or...
Tuesday, May 22, 2012 at 1:12am
Biology for sister
my sister need help with biology homework she need to describe ecology of amoeba, paramecium, and diatom. telling where it be found. how it meet it nutritional needs using and explaining with the right terminology like autotrphic, photosyntetic, parasitic, etc. what impact it ...
Monday, May 14, 2012 at 6:29pm
Most birth control measures are designed for and marketed to women. Why do you think this is the case? Is it just the womans responsibility? What could be the advantages of creating more birth control methods for men?
Tuesday, May 8, 2012 at 1:45am
Some young men were told by their mothers not to wear tight briefs, as this could make them sterile and infertile. Explain how wearing tight briefs could do this. What alternative methods could you implement to avoid sterility and infertility, and why?
Tuesday, May 8, 2012 at 1:44am
Both of Susies parents died from breast cancer. Susie tested positive for the BRCA1 gene, the BRCA2 gene, and HPV; however, she does not have any cancer cells in her body or any signs or symptoms. Susie just called you and told you that she has decided to undergo a ...
Tuesday, May 8, 2012 at 1:36am
What reactions go on in your brain when you fall asleep? If you could give me a website that goes INDEPTH as to what happens in the brain when you fall asleep that would be great!
Monday, May 7, 2012 at 7:44pm
In pea plants the colour of the peas is genetically controlled. Each pea represents a separate fertilisation. Smooth texture (S) is dominant to wrinkly (s) and green (G) colour is dominant to yellow (g). Following a breeding experiment with pea plants, the following ratio of ...
Wednesday, May 2, 2012 at 7:53am
Initially, how do skeletal muscles (the type of muscle attached to bones) make ATP? write the reaction for this procss (Crp +ADP => Cr + ATP) as a 'coupled' reaction, identifying the exergonic and endergonic reactions. what would this type of ATP production be called?
Sunday, April 29, 2012 at 7:00pm
Initially, how do skeletal muscles (the type of muscle attached to bones) make ATP? write the reaction for this procss (Crp +ADP => Cr + ATP) as a 'coupled' reaction, identifying the exergonic and endergonic reactions.
Sunday, April 29, 2012 at 6:58pm
how does the REM help create a sleep signal sent from the pons in the brain that helps to stop motor neurons in the spine when a person sleeps. Please help me! I am looking for detailed information right down to the certain proteins and such! I have searched everywhere and ...
Sunday, April 29, 2012 at 3:01pm
In some dogs, long hair (L) is dominat over short hair (l), and wavy hair (W) is dominant over straight hair(w). Draw a cross between a dog that is homozygous for long hair and straight hair with a dog that is homozygous for short hair and wavy hair. What would the genotype ...
Sunday, April 29, 2012 at 2:14pm
True or false? (if false, replace word in *here*) 1) The random changes of allele frequencies associated with genetic drift frequently lead to a *gain* in genetic diverse. 2) *sexual selection* helps maintain the Hb^a/Hb^s heterozygous conditions in humans. 3) bottleneck and ...
Sunday, April 29, 2012 at 12:38pm
1,Why do autotrophs always occupy the lowest level of ecological pyramids? 2.Explain how the growth of one population can bring about the disappearance of another population during succession? 3. Describe some common plants and animals from a tropical rain forest and a ...
Thursday, April 26, 2012 at 10:19pm
Starting with the right ventricle of the heart, describe the function of the heart and the movement of the blood through the pulmonary and systemic circuit. Include a description of gas exchange within the lungs. Now consider what happens if Jake starts smoking. Discuss in ...
Wednesday, April 25, 2012 at 3:41am
I am analyzing a scientific article for my biology class. I am trying to comprehend all of the terms used and am hoping I can gain other's insight as to where this article is flawed and what could have been done to improve it. The article is titled: Effect of age and ...
Monday, April 23, 2012 at 4:56am
Jennifer is fifty-four. Her husband Brian died suddenly in a care crash. Not only was she emotionally distraught, but she found herself in serious financial turmoil. Brian had handled the finances (at least she had thought he had) throughout their 21 year marriage. Upon his ...
Sunday, April 22, 2012 at 11:51pm
How does carbon dioxide emissions from factories, cars and trucks effect global warming? How does methane released from landfills and agriculture effect global warming?
Sunday, April 22, 2012 at 4:20pm
A farmer buys a land.There were lots of insectivorous plants in it.He was unaware of this,but when he came to know this he decided not to cultivate any crops and return the land.What could be the reason behind this decision?
Sunday, April 22, 2012 at 8:02am
What geological process is used to explain how nearly identical animals that cannot swim, are found on continents separated by large oceans? What is the half-life of Uranium 238 and what did we use that radioisotope to date as the oldest item on Earth?
Saturday, April 21, 2012 at 1:29pm
Which of following is NOT characteristics of all fish? a.gills as respiratory organs b.two-chambered heart c.swim bladder for buoyancy organ d.skin with scales e.presence of jaws
Wednesday, April 18, 2012 at 9:47pm
A biology quiz consists of twelve multiple-choice questions. Eight must be answered correctly to receive a passing grade. If each question has five possible answers, of which only one is correct, what is the probability that a student who guesses at random on each question ...
Wednesday, April 18, 2012 at 8:35pm
College General Biology
A man who is a non-tongue roller (t) marries a woman tongue roller (T) whose father was a non-tongue roller (t) - what would the expected genotype and phenotype percentage for their offspring?
Wednesday, April 18, 2012 at 2:01pm
Orange juice is often touted by nutritionists as being an excellent antioxidant. Within an essay response, discuss the following concepts: an antioxidants function, free radicals and their effect on the human body, sources of vitamin C, optimal delivery system for ...
Tuesday, April 17, 2012 at 2:07pm
GENETICS PRACTICE PROBLEMS Worth 10 points each problem is either right or wrong 1. In humans, assume that brown eyes (B) are dominant over blue eyes (b). A blue eyed man, both of whose parents were brown eyed, marries a brown eyed woman whose father was brown eyed and whose ...
Monday, April 16, 2012 at 10:23pm
I am having trouble wording this question. Describe the differences in the outcomes for a dihybrid cross ifgenes are: a. completely linked b. completely unlinked c. incompletely linked.
Sunday, April 15, 2012 at 9:50pm
is insomnia the same thing as sleep deprivation. im pretty sure they are different but i just wanted to check. also what in the brain causes insomnia. What parts of the brain create it adn what are the functions?
Saturday, April 14, 2012 at 7:11am
Having a really hard time following this diagram of the Kreb cycle and I need to answer these questions: 1. Total number of NADH molecules produced for each glucose molecule in the Krebs cycle. A)2 B)4 C)6 D)8 E)10 2. The theoretical yield of ATP from each NADH molecule. A)1 B...
Saturday, April 14, 2012 at 2:59am
What must the systolic blood pressure be valued at for adequate mean arterial pressure if the diastolic pressure is 75? (Assume resting conditions) A. at least 90 B. at least 95 C. at least 100 D. at least 105 E. at least 110 F. at least 115 G. at least 120
Wednesday, April 11, 2012 at 11:02am
Predict the expected change to blood flow should norepi act on arteries of the abdominal cavity? A. Blood flow increases B. Blood flow decreases C. Blood flow stays the same but pressure increases D. Blood flow stays the same but speed decreases E. None of the Above
Wednesday, April 11, 2012 at 11:02am
If agglutination occurs when blood with a certain antigen and blood with the corresponding antibody mix, why is blood type O the universal donor? Wouldn't the A or B antibodies from the O type blood attack the blood antigens of the recipient and cause clotting?
Friday, April 6, 2012 at 6:30pm
How get caramel in caramilk bar
my sister have this question for biology how they get caramel into caramilk bar? she think the inject it in there, but she want to know how they do it.
Thursday, April 5, 2012 at 8:17pm
In class, I did an experiment with water and iodine solution in a beaker and also starch in a dialysis tube tied and placed in the beaker. There were discussion questions I couldn't answer surely... please check my answers. 1. a)Use your results to determine the direction ...
Tuesday, April 3, 2012 at 9:00am