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July 31, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

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biology/chem
How many grams of glucose should we dissolve in one liter of water to get a 0.9% solution?
Wednesday, January 19, 2011 at 12:53pm

biology
40. Explain the importance of carbon's ability to form covalent bonds in straight chains, branched chains, or rings. (3 points)
Tuesday, January 18, 2011 at 2:27pm

Biology (alert!)
Which sentence do you think does not agree with the true facts of coral reefs? 1. Off shore coral reefs are the cause of terrible storms in coastal communities. 2. Coral reefs form when the shells of thousands of corals join. 3. Sponges gives out chemicals that harden around ...
Tuesday, January 18, 2011 at 9:16am

gcse biology
who discovered dna? was it friedrich miescher,francis crick and james watson or rosalind franklin???? in know someone asked the same question yesterday but im still stuck any help would be great thankyou.
Tuesday, January 18, 2011 at 8:53am

biology
yesterday i posted a question about who discovered DNA and Ms Sue kindly helped me but im confused about who actually discovered DNA because there are four different names Friedrich Miescher,Rosalind Franklin,james D Watson and Francis Crick. my homework question is who ...
Tuesday, January 18, 2011 at 5:28am

BIOLOGY
What are the factors that lead to have low energy in men during sexual activity?
Tuesday, January 18, 2011 at 3:14am

Biology help :(
Place the following process in the correct order. a) urine is stored in the bladder. b) blood enters the afferent arteriole. c) fluids pass from the glomerulus into Bowman's capsule. d) urine is excreted by the urethra. e) sodium ions, glucose and amino acids are actively ...
Monday, January 17, 2011 at 10:13pm

Biology
Your research team suspects that lactose intolerance is a recessive trait. Which of the following observations would contradict your theory? a) Two lactose intolerant parents always have children who are lactose intolerant b) Genetic analysis shows that individuals must ...
Monday, January 17, 2011 at 9:27pm

biology
which process most likely caused the change in CO2 level in the flask over the lasy 37 minutes?
Monday, January 17, 2011 at 9:00pm

biology
Most homeostatic mechanisms are controlled with a negative feedback loop. Explain why this mechanism may be more efficient at maintaining homeostasis as compared to positive feedback mechanisms. Provide examples of both to illustrate.
Monday, January 17, 2011 at 7:45pm

biology
Why might people in the United States be more likely to be malnourished as compared to undernourished? What is the difference between the two and why is this important to know?
Monday, January 17, 2011 at 5:59pm

biology
Jane is diabetic. How does this meal affect her condition and what interventions may be needed to return her body to homeostasis
Monday, January 17, 2011 at 1:21pm

biology
Who discovered DNA was it James Watson and Francis Crick or Friedrich Miescher ? thankyou
Monday, January 17, 2011 at 1:12pm

biology
what cgange occurred in the shape of the horse from hyracotherium to equus?
Monday, January 17, 2011 at 1:02pm

Biology 12-DNA
suppose you knew the makeup of specific proteind in a cell. how would you determine the particular DNA code that coded for them?
Sunday, January 16, 2011 at 8:23pm

Biology
Are prokaryotes able to live on inorganic energy sources?
Sunday, January 16, 2011 at 7:39pm

biology
compare asexual reproduction and sexual reproduction
Sunday, January 16, 2011 at 6:43pm

Biology!!
Darwin is considered the "father of evolutionary biology." Four of his contributions to the field of evolutionary biology are listed below. The nonconstancy of species. Branching evolution, which impleies the common descent of all species. occurrence of gradual ...
Sunday, January 16, 2011 at 5:25pm

biology
rana pipiens, a species of frog, has a diploid chromosome number of 26. a. how many chromosomes are present during metaphase i? per cell? b. how many chromatids are present during anaphase i ? per cell? c. how many centromeres are present during telophase I? per cell? d. how ...
Saturday, January 15, 2011 at 11:13pm

biology
which kind of mutation affects the individual and which kind of mutuation affects the population?Why?
Saturday, January 15, 2011 at 5:52pm

Biology
Why is the manner in which subjects are assigned to study groups important to the validity of scientific investigation?
Friday, January 14, 2011 at 9:14pm

Biology
Why is the manner in which subjects are assigned to study groups important to the validity of scientific investigation?
Friday, January 14, 2011 at 9:08pm

Biology
Im doing an experiment in Biology on a drug, but im not sure where I can find information on the drug Chantix. i also have a few general questions I was hoping you could help me with... 1. Why is it improtant to have as many subjects as possible in an investigation? 2. why is ...
Friday, January 14, 2011 at 6:32pm

Biology (immune system)
How does the immune system help maintain homeostasis? Help me please :(
Thursday, January 13, 2011 at 9:17pm

english
Hi I have some questions and I would really if you answer my questions! I want to be Nurse Practitioner and I am very passion about it. But I have a lot of problems. First English is not my native language, second I am not good at math, third I am kind intimidated by the ...
Thursday, January 13, 2011 at 9:15pm

biology
A eukaryotic gene typically has all of the following features except: a) an operator b) control elements c) a promoter d) introns e) a terminator
Thursday, January 13, 2011 at 5:06pm

biology /cell analogy
Can you help me find an everyday object that has a similar function as : 1-Golgi Bodies an example 2-Lysosome an example kitchen garberator 3- peroximes example a gym 4-Vesicules/vacuoles an example water bottle 5-Cytoskeleton an example 6-Microvilli an example 7- Cilia an ...
Wednesday, January 12, 2011 at 10:50pm

biology
what adaptations do plants that live in low nitrogen habitats, such as the tundra ecosystem, possess?
Wednesday, January 12, 2011 at 10:07pm

biology
Nitrogen gas is the most abundant gas in the atmosphere. Why is it not useful to most organisms in its atmospheric state?
Wednesday, January 12, 2011 at 9:12pm

biology
Can you help me find an everyday object that has a similar function as : 1-Golgi Bodies an example 2-Lysosome an example kitchen garberator 3- peroximes example a gym 4-Vesicules/vacuoles an example water bottle 5-Cytoskeleton an example 6-Microvilli an example 7- Cilia an ...
Wednesday, January 12, 2011 at 7:57pm

Biology/help please
Can you help me find an everyday object that has a similar function as : 1-Golgi Bodies an example 2-Lysosome an example kitchen garberator 3- peroximes example a gym 4-Vesicules/vacuoles an example water bottle 5-Cytoskeleton an example 6-Microvilli an example Can you help me...
Wednesday, January 12, 2011 at 7:32pm

biology
What is the difference between ATP synthetase and ATP synthase?
Wednesday, January 12, 2011 at 5:50pm

Science
For my Biology class, I need to find and print out an article that talks about renewable resource technology or new technology that is beneficial to the environment. Can anyone help me find any good ones?
Wednesday, January 12, 2011 at 5:39pm

Biology
why is a cell small? and how can this be related to the diffusion rate and the synthetic capacity?
Tuesday, January 11, 2011 at 9:15pm

Biology
why is a cell small? and how can this be related to the diffusion rate and the synthetic capacity?
Tuesday, January 11, 2011 at 9:04pm

Biology
What role do high-energy electrons play in the electron transport chain?
Tuesday, January 11, 2011 at 8:33pm

Biology
What is a cell?
Tuesday, January 11, 2011 at 4:13pm

Biology
I have a biology worksheet that talks about secondary and primary succesion. I looked it up, and I found that Presque Isle is an example of primary succession. But, what happened there?
Monday, January 10, 2011 at 6:25pm

Biology
how does the external environment of an organism can affect gene function.
Sunday, January 9, 2011 at 10:32pm

high school biology
2. Discuss the implication of pollution of the marine and wet land environment. Sight examples from 2 named caribbean countries.
Sunday, January 9, 2011 at 7:20pm

Biology
Which of the following is NOT consumed by fungal decomposers? A. First-order heterotrophs B. Third-order heterotrophs C. Producers D. None of the Above
Saturday, January 8, 2011 at 7:53pm

Biology
Which of the following is NOT consumed by fungal decomposers? A. First-order heterotrophs B. Third-order heterotrophs C. Producers D. None of the Above
Saturday, January 8, 2011 at 7:45pm

biology
which level of organization encompasses all of the others? A. Ecosystem B. Community C. Population D. Division
Saturday, January 8, 2011 at 7:18pm

BIology
Reptiles have some specific adaptations that make them well suited to their environment. In your own words, discuss some of these adaptations by answering the following questions. Each answer should be constructed in one or two well-developed paragraphs. a. What is the ...
Saturday, January 8, 2011 at 5:33pm

biology
is glycine the most rigid amino acid in collagen
Wednesday, January 5, 2011 at 11:33pm

biology
are both ER and secretory vesicles have double bilayer membrane
Wednesday, January 5, 2011 at 8:51pm

biology
21% of a population is homozygous dominant, 49% are heterozygous and 29% are homozygous recessive. if the Hardy-Weinberg Law applies, what percentage of the next generation is predicted to be homozygous recessive?
Tuesday, January 4, 2011 at 6:58pm

Biology
Suppose in a breeding experiment, you combined 7,000 AA individuals and 3,000 aa individuals, and they mated randomly. After the first generation, what would be the value of p2 (p squared) ? of q2 (q squared)? of 2 pq? what would be the value after the second generation if the...
Tuesday, January 4, 2011 at 6:36pm

biology
what are the sequences of event hat result in erythroblastosis fetalis
Monday, January 3, 2011 at 10:31am

biology
what are the sequences of event hat result in erythroblastosis fetalis
Monday, January 3, 2011 at 10:30am

biology
List,explain and provide an example of 3 natural interactions that exist between species.
Sunday, January 2, 2011 at 3:27pm

grade 9 science biology
What activities increase the amount of carbon dioxide in the atmosphere? What activities decrease the amount of carbon dioxide in the atmosphere?
Sunday, January 2, 2011 at 2:52pm

Biology
List and describe the steps involved when a gene in person's genotype is expressed to create a biochemical or physical characteristics that is a part of the persons phenotype.
Saturday, January 1, 2011 at 9:47pm

grade 9 science biology
What happens to the available energy in an ecosystem?
Wednesday, December 29, 2010 at 7:21pm

grade nine science biology
With aid of a diagram , I need to illustrate and explain how the following nutrients are cycled through each 4 spheres. Carbon nitrogen and water
Wednesday, December 29, 2010 at 6:19pm

biology can someone check
Identify each of the parentheses items as an independent or dependent variable. 1)The (number of red blood cells )independent in a mouse's blood at(different levels of iron) dependent in its diet. 20)The (amount of starch formed)dependent in a plant leaf for (different ...
Tuesday, December 28, 2010 at 9:41pm

biology can someone check
Decide if each of the following statements is true.If it is not rewrite the parentheses part to make it true. 1) Scientific methods include observation,(forming a hypothesis, and experiment). ans: false ;answer questions; solve problems 2)A statement that can be tested and ...
Tuesday, December 28, 2010 at 9:25pm

biology
.A ______________ _ is a signal to which an organism responds
Monday, December 27, 2010 at 10:56pm

biology /check please
Is this true or false? 1. Ideas about the value of knowledge gained through scientific research come from a society's social, ethical, and moral concerns. 2. Pure science is scientific research carried out primarily to solve specific environmental problem. 3. Technology is...
Thursday, December 23, 2010 at 1:36pm

biology can someone check
Is this true or false? 1. Ideas about the value of knowledge gained through scientific research come from a society's social, ethical, and moral concerns. 2. Pure science is scientific research carried out primarily to solve specific environmental problem. 3. Technology is...
Thursday, December 23, 2010 at 12:50pm

biology /check please
Use each terms below just once to complete the passage. (1)experimental results ,(2) experiment(s), (3)hypotesis ,(4) laws ,(5) scientific journals , (6)theory ,(7) valid ,(8) verify. When (experimental) results are reported in (scientific journals) other scientits may try to...
Thursday, December 23, 2010 at 2:02am

Biology
Thanks to SraJMcGin for the links but I really don't understand this and am hoping someone can give me a really simple explanation so I get get my head around the question..... Describe the cellular specialisation that has occured in muscle cells.
Wednesday, December 22, 2010 at 11:02pm

biology
1.can introduced species strengthen the immune system of the native species 2. can an introduced species change thec composition of the natural habitat so it is unsuitable for the native species
Wednesday, December 22, 2010 at 6:28pm

biology
can foreign species improve the stability of the habitat of the native cpecies
Wednesday, December 22, 2010 at 6:22pm

Biology
Which is the correct base pairing: Adenine - Guanine Adenine - Cytosine Thymine - Guanine Thymine - Adenine Cytosine - Thymine
Wednesday, December 22, 2010 at 5:52am

Biology
Describe the cellular specialisation that has occured in muscle cells.
Wednesday, December 22, 2010 at 5:50am

biology
does denitrification occur in root nodules of legumes?
Tuesday, December 21, 2010 at 7:25pm

biology
phytoplankton-> krill-> squid-> sea lion-> killer whale which of the following would most likely be eradicated by the bioaccumulation of PCBs in the food chain shown above? a- krill b- squid c- sea lion d- killer whale
Tuesday, December 21, 2010 at 6:55pm

biology
in which biome would the extinction of an animal species have the least impact? a- tundra b- permanent ice c- tropical rainforest d- temperate deciduous forest
Tuesday, December 21, 2010 at 5:34pm

biology
which of the following pair of organisms represents a predator-prey relationship? a- flea and dog b- robin and tree c- polar bear and seal d- bacteria in human large intestine and human
Tuesday, December 21, 2010 at 5:03pm

biology
what ecological hierarchy level is being considered in an ecological study that observes the impact of the mountain pine beetle on the lodgepole pine in british columbia?
Tuesday, December 21, 2010 at 4:35pm

biology /check please
(stimulus v. response)? Which of the following is a stimulus, which is a response? Thanks 1)the recess bell ringing in an elementary school 2)your mouth watering at the sight of food on a plate 3)a sudden drop in air temperature 4) a flu virus entering your body 5) getting ...
Tuesday, December 21, 2010 at 12:44pm

BIOLOGY!
In order to keep veggies crisp, grocery stores use coold water or ice. Which would keep veggies crisper, tap water or distilled water? Explain. I have no idea...
Thursday, December 16, 2010 at 9:53pm

biology
explain why salt can be used as a weed killer.
Thursday, December 16, 2010 at 9:52pm

biology
What is the variable being tested in an experiment called?
Tuesday, December 14, 2010 at 10:07pm

biology
explain why mutations are almost always neutral or harmful
Tuesday, December 14, 2010 at 4:59pm

biology
how do fossils provide evidence of evolution. how are scientists able to determine the age of fossils.
Tuesday, December 14, 2010 at 4:58pm

biology
what role do histone proteins play in packaging DNA within nuclei.
Tuesday, December 14, 2010 at 4:55pm

biology
how is it possible for an enzyne to lower the required energy of activation for a reaction.
Tuesday, December 14, 2010 at 4:53pm

Biology
Which of the following is NOT found in the human central nervous system? A) hypothalamus B) forebrain (cerebrum) C) autonomic neurons D) medulla E) spinal cord
Monday, December 13, 2010 at 10:32pm

biology
how are energy and enzymes involved in biochemical reactions
Monday, December 13, 2010 at 7:15pm

Cell Biology
What do the two steps of transcription followed by translation do?
Monday, December 13, 2010 at 12:17pm

biology 30
effects of menopause
Sunday, December 12, 2010 at 9:30pm

biology
the unique properties of water make life possible on earth, select three properties of water and: a) for each propery, identify and define the property and explain it in terms of the physical/chemical nature of water b) for each property,describe one example of how the ...
Sunday, December 12, 2010 at 7:15pm

Biology
what are the characteristics of a rosa indica? also i need help on the lifestyle/habitat of rosa indica too plz help appreciate the help
Sunday, December 12, 2010 at 3:17pm

Biology-Respiratory System
What's the difference between capillaries, pulmonary artery and pulmonary vein?
Saturday, December 11, 2010 at 3:45pm

Biology
Angiosperms (flowering plants) are the largest phylum in the plant kingdom (Angiospermophyta is also called Anthophyta or Magnoliophyta). These plants have true roots, stems, leaves, and flowers. The roots grow into the soil to anchor the plant in place and take up water and ...
Friday, December 10, 2010 at 8:27am

biology
define PI-PCL and indicate which phospholipids it hydrolizes
Thursday, December 9, 2010 at 9:02pm

biology
discuss the function of an active adenylate cyclase
Thursday, December 9, 2010 at 9:01pm

biology
discuss the difference between passive diffusion and active transport processes
Thursday, December 9, 2010 at 8:59pm

ant101
How does the identification of cultural universals impact our understanding of what it means to be human? How does the search for universals help us better understand human cultural behavior? What examples from your own culture can illustrate the ideas that our behaviors are ...
Thursday, December 9, 2010 at 7:52pm

biology
What regulary hit the earth for the first 600 million years of existence? What do scientists call this period of time? - Aseroids, and meteors hit the earth.What do scientists called this period of time ? I need help answer this question please. If the first question is right ?
Wednesday, December 8, 2010 at 8:36am

Honors Biology - URGENT!!!
In an experiment, plants were grown under colored filters that allowed equal amounts of light of different colors to strike different plants. Under which filter do you think plants grew the slowest? Why?
Wednesday, December 8, 2010 at 8:19am

Honors Biology - URGENT!!!
Without oxygen, cellular respiration grinds to a standstill, although glycolysis can continue to make some ATP anaerobically for a short time. When oxygen runs out, why does electron transport stop? Why do you thing the Krebs cycle stops?
Wednesday, December 8, 2010 at 8:18am

Honors Biology - URGENT!!!
After a biochemical analysis of the victim's tissues, brilliant biologist/criminal investigator J. C. Mickleberry announced his findings: "Contrary to the conclusions of the police, the victim did not suffocate. The electron carriers in his mitochondria were all in ...
Wednesday, December 8, 2010 at 8:17am

Honors Biology - URGENT!!!
ATP is used to power the movement of your muscles as you turn the pages of a book. Where did the energy in the ATP come from? Trace the energy in the ATP molecule back to the sun.
Wednesday, December 8, 2010 at 8:16am

Honors Biology - URGENT!!!
Remember that the greater the concentration of hydrogen ions, the lower the pH of a solution. How do you suppose the pH of the solution in the thylakoid space compares with the pH of the solution in the stroma? What is responsible for the difference?
Wednesday, December 8, 2010 at 8:15am

Honor Biology
Remember that the greater the concentration of hydrogen ions, the lower the pH of a solution. How do you suppose the pH of the solution in the thylakoid space compares with the pH of the solution in the stroma? What is responsible for the difference?
Monday, December 6, 2010 at 4:02pm

Honor Biology
ATP is used to power the movement of your muscles as you turn the pages of a book. Where did the energy in the ATP come from? Trace the energy in the ATP molecule back to the sun.
Monday, December 6, 2010 at 3:59pm

Honor Biology
After a biochemical analysis of the victim's tissues, brilliant biologist/criminal investigator J. C. Mickleberry announced his findings: "Contrary to the conclusions of the police, the victim did not suffocate. The electron carriers in his mitochondria were all in ...
Monday, December 6, 2010 at 3:57pm

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