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March 30, 2017

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Homework Help: Science: Biology

Recent Homework Questions About Biology

biology
if there is no colonies on the wild type or lysate or ADP-6only plates, did you obtain an approximate 10x-fold change in colony numbers between the different dilutions? did you expect this? pls help
Wednesday, March 29, 2017 by silvia

Biology
The p53 enzyme system prevents progression to which stage of the cell cycle? choices are: 1. G1 2.Cytokineses 3.S phase 4. Mitosis 5. G2 * I think it's S phase, It's not G1 right?
Tuesday, March 28, 2017 by sarah

Biology
A 2n cell has 23 pairs of chromosomes. At the end of Meiosis 1, how many individual chromosomes will each daughter cell have? ____ IS it 46?
Tuesday, March 28, 2017 by lilly

biology
HELP PLEASE!!!! How does the outcome of a chemical reaction that absorbs energy differ from one that releases energy?
Tuesday, March 28, 2017 by ray

Biology
Fossils are (select all correct choices) * 1. molds and casts of organisms in the past. 2. drawings of ancient animals and other organisms. 3. footprints or burrows of small animals that lived in the past. 4. the preserved remains or traces of organisms that lived in the past...
Friday, March 24, 2017 by Cassandra

Biology
Why do mosquitoes like biting the face more than other part of the body?
Friday, March 24, 2017 by Joseph Jeremiah Tokshak

biology 30
suppose that sample of beef broth initially contains 16 bacterial cells. after 4.0 h, there are 1.6 x 106 bacterial cells in the sample. calculate the growth rate of the bacterial population for the given time interval. (record your answer in scientific notation: x x 10n )
Thursday, March 23, 2017 by lalala

biology
a)what are the main similarities b/n cholera and typhoid?
Wednesday, March 22, 2017 by guto

maths
3. Suppose a bookcase shelf has 5 Mathematics texts, 3 Biology texts, 6 Chemistry texts and 4 Physics texts. Find the number n of ways a student can choose: a. one of the texts; b. one of each type of text.
Wednesday, March 22, 2017 by roze

Biology
What is one of the outputs or products of respiration? It has to be a four letter word with the second letter being e because it is the hint that my teacher gave us. I couldn't find anything on it. So far I have disocovered is carbon dioxide, water, and atp.
Tuesday, March 21, 2017 by David

Biology
Why does our fingers have a number of hinge joints rather than one or two?
Saturday, March 18, 2017 by Lia

Biology
The gene for red hair is recessive to the gene for black hair.What will be the hair colour of a child if he inherits a gene for red colour from his mother and a gene of black hair from his father?Express with the help of a flow chart..if you can..otherwise can you please tell ...
Saturday, March 18, 2017 by Elsa tony

biology
Where is the spinal nerve and what is it made of?
Thursday, March 16, 2017 by homework

Biology
Which of the following mechanisms for osmoregulation or nitrogen removal is correctly paired with its corresponding animal? A) metanephridium-earthworm B) Malpighian tubule-frog C) kidney-insect D) flame- bulbsnake
Thursday, March 16, 2017 by Kara

Biology
the eventual evolution of living organisms on earth is based upon the following theory: during the early stages of the earth's history the chemical characteristics of the world changed as the conditions on the planet changed. The changes established the conditions necessary ...
Wednesday, March 15, 2017 by Samantha

Biology
Cladograms and phylogentic trees can give you information about relatedness of species and evolutionary history True or False
Monday, March 13, 2017 by Regina

Biology
Is medulla oblongata responsible for peristalsis?
Saturday, March 11, 2017 by Jonathan

Biology
What's the largest and most successful kingdom in the animal kingdom?
Saturday, March 11, 2017 by Jonathan

Biology
A biologist found that 20% of a population of bats are brown, which is recessive. assuming the population shows Hardy-Weinberg equilibrium, determine the genotype and the allele frequencies of the population?
Friday, March 10, 2017 by Sarah

biology (check answer)
What is different about every nucleotide of a DNA molecule? a) the deoxyribose sugar b) the phosphate group c) the shape of the molecule d) the nitrogen bases it's the nitrogen bases, am i correct?
Monday, March 6, 2017 by quickquestion

Biology
Unikonta paraphyletic or monophyletic? Animalia paraphyletic or monophyletic?
Sunday, March 5, 2017 by Kara

biology
why does the knee jerk reflex work for someone with spinal cord injuries?
Sunday, March 5, 2017 by homework

biology
why does the knee jerk reflex still work for people who have spinal cord injuries?
Friday, March 3, 2017 by homework

biology
how is the knee jerk reflex (like when a hammer hits the knee and the leg stretchs out) related to proprioception? if someone doesn't have proprioception why would their leg not move when it is hit by the hammer?
Thursday, March 2, 2017 by homework

Biology
I am doing a project on the lymphatic system. I need ideas as a activity the class can do. I don't want there to be a lot of materials needed. Help?
Thursday, March 2, 2017 by Sherlock

Biology
Please help with these questions question: Oxygen consumption by a growing culture of Escheri... oxygen consumption by a growing culture of Escherichia coli bacteria. What could explain the gradual consumption of oxygen, even though no glucose has yet been added to the ...
Wednesday, March 1, 2017 by Anonymous

Biology
Please help with these questions question: Oxygen consumption by a growing culture of Escheri... oxygen consumption by a growing culture of Escherichia coli bacteria. What could explain the gradual consumption of oxygen, even though no glucose has yet been added to the ...
Wednesday, March 1, 2017 by Anonymous

Biology
Please help with these questions question: Oxygen consumption by a growing culture of Escheri... oxygen consumption by a growing culture of Escherichia coli bacteria. What could explain the gradual consumption of oxygen, even though no glucose has yet been added to the ...
Wednesday, March 1, 2017 by Anonymous

Biology
Please help with these questions question: Oxygen consumption by a growing culture of Escheri... oxygen consumption by a growing culture of Escherichia coli bacteria. What could explain the gradual consumption of oxygen, even though no glucose has yet been added to the ...
Wednesday, March 1, 2017 by Anonymous

biology
physics osmosis
Monday, February 27, 2017 by andy

biology
would it be easier if someone who doesn't have proprioception to go to space and return back to earth to walk normally or would it be the same?
Sunday, February 26, 2017 by homework

Biology
What do the structures of Glycine and Arginine have in common? And what makes them different?
Saturday, February 25, 2017 by Calicia

biology lab
26.2g of sodium chloride(NaCL) are dissolved in enough water to make 100mL of solution. What is the molarity of this solution?
Friday, February 24, 2017 by nicole

biology lab
how many grams of mercury II Nitrate will you need to prepare 500mL of a .60 M solution ?
Friday, February 24, 2017 by nicole

Biology
What amino acid property makes proteins highly functional? I would assume it would be the structure and sequence, but are there additional properties?
Thursday, February 23, 2017 by Aaron

biology
If you were testing a reflex on your knee, why would that be slower than a conscious reflex (like if someone told you to grab something right when it falls) in your brain?
Thursday, February 23, 2017 by homework

Biology
A life cycle in which organisms switch back and forth between diplid and haplid stages?
Wednesday, February 22, 2017 by Anonymous

BIOLOGY
1. what are the differences between white blood cells and antibodies? 2.why is HIV not detected immediately as foreign material once it enters our blood stream or white blood cells? 3.what is the enzyme used by HIV to convert RNA to DNA?
Wednesday, February 22, 2017 by sophie

Biology
What is the reaction that creates polysaccharides? What covalent bond forms between 2 sugars? Which is the main group involved in this bond formation? I've been reading my book for hours and I can't find the answer to this
Wednesday, February 22, 2017 by Bree

biology
if you have 1.0*10^9 molecule in tube and perform a 10^-7 dilution, how many molecule will in the new tube?
Wednesday, February 22, 2017 by anonymous

biology
if you want to make 50 ml of a 1x TAE solution fro a 50X stock, how would you prepare it?
Wednesday, February 22, 2017 by anonymous

Biology
number of water molecules produced when 14 amino acids are join to form a polypeptide bond?
Tuesday, February 21, 2017 by Stacy

Biology
We know that variations (differences) within a population are necessary for natural selection to occur. Which of the following is NOT a source of genetic variation? a. Mutations b. Independent assortment c. Crossing over d. Mitosis
Tuesday, February 21, 2017 by kacy

biology
you added 3ml stock solution of 0.05mg/ml of dye and 7ml of water, what will be the final concerntration.
Tuesday, February 21, 2017 by cindy

Biology
What is the path that electrons take in C3 photosynthesis?
Monday, February 20, 2017 by Anon

biology
A bacterium has a genome size of 6.0 X 106 base pairs. There is one Origin of Replication (ORI) and each DNA polymerase catalyzes the addition of 1,000 nucleotides/second. How much time is needed to replicate the entire genome?
Monday, February 20, 2017 by sara

biology
a. what are the composition in nutrient broth? b. give 5 different types of media used for cultivation of microbes and define each?
Sunday, February 19, 2017 by sophie

EDTECH
1. Which of the following could be an engineering project that could better protect the planet? -finding a new landfill site -designing a better trash compacter -deciding which product can be recycled*** -growing microbes that eat oil 2. Engineers who are working to find ...
Saturday, February 18, 2017 by Lily-MS.SUE ANYBODY

biology
what kind of bond holds the hydrogen to the oxygen in one water molecule??
Wednesday, February 15, 2017 by liana

Biology
how many grams of sucrose would I need to make 350mL of an 18% solution?
Monday, February 13, 2017 by Nicole

math
In a class of 80 students,53 study Art,60 study biology,36 study art and biology,34 study art and chemistry,6 study biology and 18 study biology but not chemistry.Determine the number of students who study =Art only =Chemistry only
Wednesday, February 8, 2017 by Nana Adwoa

Maths
In a class of 80 students,53 study Art,60 study biology,36 study Art and biology,34 study Art and chemistry,6 study biology but not chemistry.Illustrate the information on a Venn diagram.Determine the number of students who study Art only And Chemistry only
Wednesday, February 8, 2017 by Nana Adwoa

biology
If allele frequencies change, natural selection must be acting in some way. True or False?
Friday, February 3, 2017 by Alex

biology
A devastating tsunami wipes out most of the population of a frog species that lives on just one tropical island. What is the most likely outcome of this event? A) frequency-dependent selection B)inbreeding depression C)rapid adaptive evolution D)purging of all deleterious ...
Friday, February 3, 2017 by Alex

Biology
If I have 2.5 amylase stock solution, 2.5 PBS Buffer, and final amylase concentration of 25 [ug/ml] , how do you calculate the amylase dilution factor?
Thursday, February 2, 2017 by Sarah

Biology
Why would the GBI (Georgia Bureau of Investigation) want to use gel electrophoresis? A. Determine if someone has a genetic disease B. Determine the paternity of a child C. Determine the proper genetic sequence to make insulin D. Determine the identity of a criminal Not sure help?
Thursday, February 2, 2017 by Amber

Biology
DNA is a nucleic acid made up of monomers called A. nucleotides B. polypeptides A?
Thursday, February 2, 2017 by Amber

Biology
A heterozygous brown eyed (Bb) parent and a homozygous brown eyed parent (BB) have offspring. Which of these genotypes would not occur in their offspring? A. bb B. Bb C. BB Not positive but A?
Monday, January 30, 2017 by Amber

Biology
A genotype represented by the letters TT is considered to be which of the following? A. Heterozygous dominant B. Homozygous recessive C. Homozygous dominant D. Heterozygous recessive A? Not sure
Monday, January 30, 2017 by Amber

Biology
The short stem trait (t) is recessive to the tall stem trait (T). If a homozygous short pea plant is crossed with a heterozygous tall plant, what is the chance that the offspring will be short? A. one out of four B. three out of four C. all four D. two out of four ???
Monday, January 30, 2017 by Amber

Biology
John has blue eyes. Blue eyes are recessive to the dominant trait for brown eye color. His genotype is bb. What is Johns phenotype? I don't know. Explain?
Monday, January 30, 2017 by Amber

Biology
Mendel crossed two pea plants. One pea plant was homozygous tall (TT) and the other was homozygous short (tt). What are the possible phenotypes (how many tall plants and how many short plants did he get?) I don't understand questions like this.
Monday, January 30, 2017 by Amber

Biology
A homozygous short dog (dd) is crossed with a heterozygous tall dog (Dd). What is the probability that the offspring will be short? Not sure ?
Monday, January 30, 2017 by Amber

biology
what role doescarbon dioxide play in plant processes
Sunday, January 29, 2017 by Anonymous

Biology
During the Late Carboniferous, Indiana lay close to the equator, making the climate humid and warm. Swamps and wetlands were prominent in much of the state. Dominant fossil plants from this time include lycopods, conifers, and seed ferns (extinct gymnosperms). Plant material ...
Saturday, January 28, 2017 by Angelina

Biology
John has blue eyes, blue eyes are recessive to the dominant trait for brown eye color. his genotype is bb . What is johns phenotype? A. brown B. Bb C. Blue D. bb My best answer is B
Friday, January 27, 2017 by Leslie

biology
John has blue eyes, blue eyes are recessive to the dominant trait for brown eye color. his genotype is bb . What is johns phenotype? A. brown B. Bb C. Blue D. bb My best answer is B
Friday, January 27, 2017 by Leslie

biology
1)Can you suggest reasons why a phylogeny based on molecular evidence and a phylogeny based on morphology and other evidence might not be exactly the same? 2) Zoologist worldwide are sequencing a mitochondrial gene CO1 (cyctochrome c oxidase subunit), which is found in all ...
Friday, January 27, 2017 by Henry

biology
Which of the following organs remove nitrogenous waste from the body? a. Liver b. Large Intestine c. Kidneys d. Gall Bladder
Thursday, January 26, 2017 by Jane

Biology
27. Part A. Make a punnett square (as best as you can in this online format) and cross parents both with the thumb genes Aa (A=normal thumb, a=hitchhikers thumb) and show the results. (1 pt) A a A AA Aa a Aa aa 27 Part B. (1 pt) Approximately what percentage of their children ...
Thursday, January 26, 2017 by Zoi

BIOLOGY/EVOLUTION
Q7. In the Mountains and Valleys exercise, which of the following parameters had the largest influence on whether the finch population evolved a bimodal distribution? The speed at which the model ran. The difference in carrying capacity between the wet versus dry sides of the ...
Thursday, January 26, 2017 by anonymous

DAV; subject biology
What are bio - degradable pollutant?
Tuesday, January 24, 2017 by harish

biology
Scientific Method Project In a 2-page maximum type written paper, complete research on a topic of question from the readings. Utilizing the scientific method, document the application of the steps in determining your hypothesis and findings. Each step is worth up to 20 points...
Monday, January 23, 2017 by carol

biology
Which is an ion found in a glass of water? i think it would be oxygen, correct?
Thursday, January 19, 2017 by Castermans.m

Biology
An example of homologous structures would be our front teeth and ___: a. the mandibles of a crab b. the mouthparts of a mosquito c. the beak of a bird d. the tentacles of a sea worm e. the front teeth of a horse I'm having difficult on which answer is right (my answer would be...
Wednesday, January 18, 2017 by KC

Biology
A green flower (GG) is crossed with a white flower (gg). Which combination of alleles is a possible outcome? * a. GG only b. gg only c. Gg only Not sure to be honest? Help?
Wednesday, January 18, 2017 by Amber

Biology
Explain the meanings of Mendel’s principle of segregation and principle of independent assortment. Under what circumstances does the principle of independent assortment hold true? Give an example in which this law does not apply.
Tuesday, January 17, 2017 by Sarah

Biology
I have a question on plant science, wondering where I can get the answer..
Tuesday, January 17, 2017 by Jeff

Biology
2 g of glycine (C2H5NO2) are dissolved in water to a total volume of 3 L. What is the concentration of the glycine solution in M? Round answers to two significant figures.
Monday, January 16, 2017 by Tori

Biology
what is the definition of respiration?
Monday, January 16, 2017 by lopiah

Biology
What is DNA replication?
Wednesday, January 11, 2017 by Annabeth

biology
Can you please explain this to me? List all the possible genotypes of a pea plant with purple flowers and round seeds.
Tuesday, January 10, 2017 by Kelley

biology
Sketch a mold cell and label the key parts. Include all of the following:  Ribosomes  Mitochondrion  Endoplasmic reticulum  Nucleus  Cell wall  Cell membrane  Golgi apparatus  Vacuole  Centriole
Monday, January 9, 2017 by Diamondchic

biology
Convert these dates to BP dates (using 1950 as "the present.") Wood fragments from the floor of a palace in Syria - Syro-Hittite period. Date: 675 ± 50 years BCE
Thursday, January 5, 2017 by bailey

biology
1. The table in Figure 12-3 showes the results of measuring the percentages of the four bases in the DNA of several different organisms. Some of the values are missing from the table. Based on Chargaff's rule, the percentages of guanine bases in chicken DNA should be around ...
Tuesday, January 3, 2017 by Anonymous

biology
1. The table in Figure 12-3 showes the results of measuring the percentages of the four bases in the DNA of several different organisms. Some of the values are missing from the table. Based on Chargaff's rule, the percentages of guanine bases in chicken DNA should be around ...
Tuesday, January 3, 2017 by andrea

Biology science
What is the nature of the phloem vessels after they are stained in the microscopic sections
Tuesday, December 27, 2016 by Ibrahim

Biology
State the changes that occur in arterioles in the human skin during thermoregulation
Tuesday, December 27, 2016 by Edith

Biology
What's the importance of destination in a mammal
Tuesday, December 27, 2016 by Edith

biology
How can the absence of starch in the elaborated sap be explained knowing that it is produced by photosynthesis ?
Monday, December 26, 2016 by lama

biology
How can the absence of starch in the elaborated sap be explained knowing that it is produced by photosynthesis ?
Sunday, December 25, 2016 by lama

Biology
State the cell theory as we understand it today.
Sunday, December 25, 2016 by Khaled

Biology
What is the purpose of control in a scientific experiment.
Sunday, December 25, 2016 by Khaled

Biology
1. Why water potential values are negative? 2. Why turgidity is so important for plant cell?
Sunday, December 25, 2016 by Yesuf

Biology
What are electronic wastes?
Tuesday, December 20, 2016 by Abhishek

Biology
The anticodon for GCG is: A) AUA B) CCT C) UAU D) CGC **D
Monday, December 19, 2016 by Stacy

biology
In Angus cattle, the fur color black (B) is dominant to the color red (b). If we cross a homozygous dominant bull with a homozygous recessive cow is it possible for the offspring to be red?
Friday, December 16, 2016 by patrina

Biology
1. True or false: even when your research does not support your hypothesis, the hypothesis has value. True False 2. Which one of these could define a "hypothesis?" educated guess conclusion scientific prediction 3. Once you have formulated your hypothesis, you would ...
Wednesday, December 14, 2016 by Leslie

Biology
what does ribosome mean in simple english?
Wednesday, December 14, 2016 by student

Biology
Refer to the illustration above.wich point on the graph indicates approximate world population in the year 1950
Wednesday, December 14, 2016 by Galilea

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Homework Help: Science

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