Tuesday
July 28, 2015

Homework Help: Science: Biology

Recent Homework Questions About Biology

mathematics
If Musa scored 75 in Biology instead of 57, his average mark in four subjects would have been 60. what was his total mark?
Saturday, April 5, 2014 by sunkanmi

Science/Biology
Please check my answers: 1. Which of the following correctly states the relationship between monkeys and humans? A. Humans and monkeys evolved from apes. B. Humans evolved from monkeys. C. Humans and monkeys evolved from the same ancestor, which is now extinct. D. Humans ...
Friday, April 4, 2014 by Anon

Biology
What are the three types of dispersion?
Thursday, April 3, 2014 by Anonymous

Biology
Which is the highest? Ecosystem population community
Thursday, April 3, 2014 by Anonymous

biology
Give the phenotype and genotype for the F2 generation of a person with Type a heterozygous blood and a type O blood type. Remember to use all possible parents. Using Punnett squares I got 50% type a blood and 50% type o blood is this right??
Wednesday, April 2, 2014 by maya

biology
Sperm cells are moved out of the testes in the
Tuesday, April 1, 2014 by Anonymous

Biology
The purines in DNA are A.thymine and cytosine B.thymine and guanine C.adenine and guanine D.adenine and cytosine
Tuesday, April 1, 2014 by Mariah

biology
On a hot, summer day, what would most likely be the limiting factor, the light reaction, or the dark reaction (in terms of photosynthesis)? I don't necessarily need the question answered. Rather, I don't quite understand how limiting factors, light and dark reactions ...
Tuesday, April 1, 2014 by Alena

Biology
I know it is a bit long and maybe difficult, please help me to answer these.. 1) I have pET28a with insert inside. Insert is 400 bp in size. I want to check my insert with both single digestion and double digestion. I already isolated my plasmid but i do not know the next ...
Monday, March 31, 2014 by Restriction Enzyme Digestion

Physics
It's called Mike's Online Biology: MOB University. Click physics Tutoring tab -> chapter 9 -> scroll down to question #13 with video below it. I used it as a guide.
Sunday, March 30, 2014 by Renee (FOR DAMON)

Biology (fetal pig)
What substance passes through the glottis? [Is it Air??] What substances passes through the esophagus? [I don't know if this is food] please help. thanks
Friday, March 28, 2014 by Sarah

Science
Describe how the structure of DNA is correlated with its role as the molecular basis of inheritance in Biology.
Friday, March 28, 2014 by Sally

Biology
Why does an increase in light intensity cause the rate of photosynthesis to increase?
Wednesday, March 26, 2014 by A

biology - genetics
is the cis-regulatory sequence found in the exome?
Wednesday, March 26, 2014 by santoki

biology - genetics
how do you compare the reversibility of point mutations and microsatellites? I thought point mutations could reverse but microsatellites can't but idk the reason.
Tuesday, March 25, 2014 by santoki

Biology
How does diving bradycardia reflex help explain why we can survive after falling into cold water and being submerged for long periods of time? Give a physiological reason that explains the relationship between lung size and body size. From a physiological perspective, why is ...
Monday, March 24, 2014 by Aria

Biology
The integumentary system includes • skin only** • hair only • nails only • skin, hair, and nails Is my answer correct? the **
Saturday, March 22, 2014 by Sandra

Biology
Read the DNA sequence given below in the 3' to 5' direction and please tell me all of the potential start codons (i.e. every time you see the DNA version of a start codon, even if it does not immediately come after a promoter). 3'-TTCCGTAACTTCGGCGCATCTAGCTTGAGCTCC...
Saturday, March 22, 2014 by Danielle

Biology
What 3' to 5' DNA sequence would correspond to a 5'-AUG-3' start codon?
Saturday, March 22, 2014 by Danielle

Biology
(This question ties into the previous question I posted about mRNA). Use the Universal triplet code to determine the sequence of amino acids that would be generated for each of the mRNA sequences that you generated in question 2. Remember that the reading of mRNA goes in the 5...
Saturday, March 22, 2014 by Danielle

Biology
Does it matter which strand is the 'code strand'? The following two sequences look identical, except one runs 3'-5' and the other 5'-3'. For each DNA sequence given below, write the mRNA sequence that would be coded from it. Make sure you indicate the ...
Saturday, March 22, 2014 by Danielle

Biology
For the DNA sequence given below, write the complementary DNA sequence that would compliment the double-strand DNA 3'--ATTGCTTACTTGCATGGTACCTCTAGCGTTTA​GGC--5'
Saturday, March 22, 2014 by Danielle

BIOLOGY
Which of the following statements is NOT true about gamete formation in mammals? a)In the female, the separation of cytoplasm is unequal during meiosis. b)Only one of the four cells resulting from meiosis goes on to become an oocyte. c)Only one of the four cells resulting ...
Saturday, March 22, 2014 by TEESHAN

human biology cardiology
A flow of blood directly from the right atrium to left atrium is a dangerous complication of certain heart abnormalities. It can lead to cyanosis. What do you know about the flow of blood through the heart and lungs that would explain this? Yes, I do know what cyanosis means. ...
Saturday, March 22, 2014 by Samarkand

biology
I need help with what is happening inside the mitochondria. may help me what's happening 0-50 secondes. h t t p: // w w w.y o u t u b e.c o m / watch ?v=RrS2uROUjK4
Friday, March 21, 2014 by jess

Biology
Exogenous treatment with the plant hormone, ABA or auxin, induces enhanced susceptibility against biotrophic pathogens. Design an experiment that can reveal whether these hormones use the same signalling pathway or independent pathways to induce susceptibility.
Friday, March 21, 2014 by Justin

Biology
oil spills and leaks in the pacific ocean have harmed marine organisms and the environment. which kind of environmental issue is illustrated by this example? a) Resource Use b) Pollution c) Population Growth d) Biodiversity
Friday, March 21, 2014 by Skyler

Biology
How do the kidneys clean the blood? (1 point) • Kidneys clean the blood by breaking down nutrients. • Kidneys clean the blood by filtering it to remove wastes. • Kidneys clean the blood by absorbing nutrients. • Kidneys clean the blood by destroying ...
Thursday, March 20, 2014 by Sandra

Biology- Please Check
Crossing over (genetic recombination) and independent assortment result in A.) genetic variation in the gametes B.) four identical gametes C.) two diploid cells D.) a very large number of mutations
Thursday, March 20, 2014 by Cassie

Biology- Please Help
Crossing over (genetic recombination) and independent assortment result in A.) genetic variation in the gametes B.) four identical gametes C.) two diploid cells D.) a very large number of mutations
Thursday, March 20, 2014 by Cassie

biology
Can you give me a long list of smelly animals
Thursday, March 20, 2014 by andrew

College Math
In a group of 200 high school students, 36 are taking biology, 52 are taking Spanish, and 126 are taking neither biology nor Spanish. If one of these 200 students is to be chosen at random, what is the probability that the student chosen is taking biology but not Spanish?
Wednesday, March 19, 2014 by Ed

biology
What graphic could you use to best show the checkpoints in the cell cycle? a. line graph b. bar graph c. flowchart d. map I'm not sure, I think it's c?
Wednesday, March 19, 2014 by Anonymous

biology
In chickens, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (ZW). The mechanism for inheritance of the sex chromosomes is exactly the same as for X and Y sex chromosomes in other species. In chickens the character of ‘barred’ or...
Wednesday, March 19, 2014 by raj

Biology
A poultry farmer hopes to profit from the current craze for keeping egg laying chickens as pets and wishes to increase his stock of interesting and unusual breeds. (a) The farmer crossed a pure-breeding white chicken with a pure-breeding black chicken and found that 100% of ...
Wednesday, March 19, 2014 by raj

Biology
Briefly describe a portal system and give the location of two portal systems in the human body.
Tuesday, March 18, 2014 by Nicole

Biology
My AP Biology class is exploring alpha amylase production in germinating barley seeds. There are three treatments the seeds, or more specifically the half-grains, are put in. 1) half grains with no embryo and no GA 2) half grains with an embryo present 3) half grains with no ...
Monday, March 17, 2014 by Mia

Biology help please!
What is your opinion of the balance of nature hypothesis? Would the deer on the island be better off, worse off, or about the same without the wolves. Defend your position.
Sunday, March 16, 2014 by Anonymous

Biology
When a teapot boils, we see a white cloud rising from the spout. The white cloud is composed of: A. water in the liquid phase B. water in the gaseous phase c. water molecules coming apart to from H+ and OH- ions D. H+ and OH- ions coming together to form water molecules. Explain!
Sunday, March 16, 2014 by Anonymous

Biology
What is a mutation? How does this change the information in a DNA molecule?
Sunday, March 16, 2014 by Anonymous

Absorption spectra of pigments
On the graph light absorption in % vs wavelength, how come the color of chlorophyll is green? Since this is an absorption spectra, isn't it supposed to absorb blue and red and not green? Rather, it reflects green??? How would the graph be different if it is a reflection ...
Friday, March 14, 2014 by Anonymous

AP Biology
The one-pod condition (P) is dominant to the three pod condition (p). Normal leaf (L) is dominant to wrinkled leaf(l). Determine the genotypes for the two parents for all possible matings producing the following: 150 one pod normal, 147 one pod wrinkled, 51 three pod normal, ...
Friday, March 14, 2014 by Luis

Biology
What is the basic unit of information in a DNA molecule? In an RNA molecule? In a polypeptide?
Friday, March 14, 2014 by Anonymous

biology please help
whiich of these fit together A. lipase B. nuclease C. pancreatic amylase D. pepsin bread crumb stuffing butter mashed potatoes turkey
Thursday, March 13, 2014 by Ann

Biology
Are my answers correct? 1. What term describes the relationship of the ankle to the hip? Medial Proximal Distal this one Superior Anterior 2. What term describes the relationship of the nose to the mouth? Superior- this one Deep Anterior Inferior Superficial
Wednesday, March 12, 2014 by John

STATISTIC HELP
1.M&M candies are great for probability. The following tables are the color distributions for the candies. Fill in each table with the missing probability and answer the questions that follow. Plain Brown Blue Green Orange Red Yellow Probability 0.3 0.1 0.1 0.1 0.02 ??? ...
Wednesday, March 12, 2014 by bowershe

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.
Tuesday, March 11, 2014 by Ann

biology PLEASE HELP
The __________ (the cell’s outer border) controls the movement of materials into and out of the cell. It is called a lipid bilayer because of the type of molecules it is made up of and it has two layers
Tuesday, March 11, 2014 by Ann

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.
Tuesday, March 11, 2014 by Ann

Human biology please help
Sequences of chemical reactions, called metabolic pathways, can be sped up, or catalyzed, by (A) __________ , which are made mostly of (B) ___________.
Tuesday, March 11, 2014 by Ann

biology
I'm doing a lab report for a cellular respiration experiment. My experiment involves blowing/exhaling CO2 into Bromothymol blue solution until it turns yellow, then adding drops of Nh3 (ammonia) to turn it back to its original blue color. I'm seeing if the amount of ...
Tuesday, March 11, 2014 by maya

Statistic Please Check
Check this out please Thanks Lesson 3 Unit 2 Probability Couplements, Disjoint Events and the addition Rule 1.M&M candies are great for probability. The following tables are the color distributions for the candies. Fill in each table with the missing probability and answer the...
Tuesday, March 11, 2014 by bowershe

Please Help Me :( Science: Biology, Genetics!
Please help me with science genetics questions? Thanks to all who answer!! :) 1. Chromosome pairs contain different versions of genes, which are called ________. 2. The process in which body cells are duplicated in order to grow and repair body tissues is called _____________...
Monday, March 10, 2014 by Hannah

Biology
There are several questions about plasmid isolation experiment Please help me answer them img493.yukle.tc/image.php?id=5940Adsiz.j​pg
Monday, March 10, 2014 by Plasmid isolation

Biology
Sort the terms and phrases as to whether they function in or describe primary growth or secondary growth? Place each term or phrase to the appropriate bin. If the term or phrase describes both primary and secondary growth, place it to the "both" bin. If the term or ...
Sunday, March 9, 2014 by Thomas

biology
mention some tests for enzyme?
Friday, March 7, 2014 by test for enzyme?

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.
Thursday, March 6, 2014 by Drake

Biology -Genetics
True or False X and Y chromosomes are found only in eggs and sperm. T or F ?
Wednesday, March 5, 2014 by Amy

BIOLOGY
In angiosperms, pollen grains are A. diploid and are made when haploid gametes join in fertilization B. diploid and are made when haploid gametophytes join in pollination C. Haploid and are made when haploid spores undergo mitosis D. haploid and are made when haploid ovules ...
Wednesday, March 5, 2014 by Cherry

Biology
Which earthworm organ serves excretory function by excreting metabolic waste?
Monday, March 3, 2014 by Sarah

Biology
1. A heterotroph A. Is an autotroph B. eats other organisms C. Is a primary consumer D. A and c Is it d? 2. A scavenger A. Is an autotroph B. eats decomposing matter C. Kills animals D. All of the above Is it d?
Sunday, March 2, 2014 by Anonymous

Biology
What are secondary consumers considered as? Are the carnivore, omnivore, herbivore. Hint: there are two answers
Sunday, March 2, 2014 by Anonymous

Biology
Which of the following is correctly matched with its tissue system? cortex/dermal tissue system cuticle/vascular tissue system phloem/dermal tissue system stele/vascular tissue system>>>> my choosen answer
Friday, February 28, 2014 by Help

biology
list all the molecules in the process transcription
Friday, February 28, 2014 by anonymous

BIOLOGY
Can an individual organism change its own genes?
Thursday, February 27, 2014 by Anonymous

Biology
Conducting cells in xylem are: Sieve tube elements Tracheids Tracheids and vessel elements Vessel elements Tracheids and sieve tube elements please help with my homework thanks.
Thursday, February 27, 2014 by Sarah

Biology
Organisms that assemble their own organic molecules from water and elements that they absorb from their environment are which of the following? Is this detritivore or decomposer? I am confused by these two. thanks
Thursday, February 27, 2014 by Sarah

Biology
Staphylococcal nuclease (Staph Nuc) is a heat-stable, potent secretory protein that cleaves dsDNA in vitro. You have a cloned the Staph Nuc gene on pBR322 plasmid and transferred into E. coli. You have named the chimeric plasmid pBR322 with the cloned Staph nuc gene as pNuc. ...
Thursday, February 27, 2014 by UAB

biology
Staphylococcal nuclease (Staph Nuc) is a heat-stable, potent secretory protein that cleaves dsDNA in vitro. You have a cloned the Staph Nuc gene on pBR322 plasmid and transferred into E. coli. You have named the chimeric plasmid pBR322 with the cloned Staph nuc gene as pNuc. ...
Thursday, February 27, 2014 by annslee

biology
complexity of asexual and sexual
Saturday, February 22, 2014 by anonymous

Biology
5 reasons why conservation of natural resources are important
Saturday, February 22, 2014 by Bimbo

biology
a farmer sprays insecticide on his crops and notices that the insect pest problems disappear. a year later he tries the same insecticide only to find that he did not achieve the same result. the insect population shows resistance to the insecticide. This is an example of ...
Friday, February 21, 2014 by Skyler

biology, genetics
Suppose that r, red, and sc, scarlet, are two recessive eye-color mutations that lie 20 map units apart on the Drosophila X chromosome, and that each causes a red eye color in place of the wild type purple color. A. If a female from pure-breeding rr stock is mated with a red-...
Friday, February 21, 2014 by Rain

Biology
A typical organism that might occupy a forest in the southwestern United States is a a. Cactus b. grizzly bear c. parrot d. polar bear
Thursday, February 20, 2014 by David

Quick biology help please!!!
In natural selection why do animals die? Why do some animals die while others thrive? Why do phenotypes of a population change?
Wednesday, February 19, 2014 by Anonymous

BIOLOGY
In natural selection why do animals die? Why do some animals die while others thrive? Why do phenotypes of a population change?
Wednesday, February 19, 2014 by Anonymous

Biology
Why do the physical characteristics of the overall population change? Why do some animals die and some thrive? In natural selections why do the animals die?
Monday, February 17, 2014 by Anonymous

BIOLOGY
GIVE AN EXPLANATION OF "SIMILARITIES IN EMBRYOLOGY" give an exclamation for geography as known as distribution of organisms
Monday, February 17, 2014 by Anonymous

Biology help
Why do the physical characteristics of the overall population change? Why do some animals die and some thrive? In natural selections why do the animals die?
Monday, February 17, 2014 by Anonymous

biology
what is hypertonic and how does it happen
Monday, February 17, 2014 by mohammed

biology
what is the hypertonic hypotonic isotonic ,
Sunday, February 16, 2014 by mohammed

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.
Sunday, February 16, 2014 by Isabella

biology
how can i make my carier in torism
Thursday, February 13, 2014 by ash

Biology
Can someone please help me find a website? I am doing a project on Maple Syrup Urine Disease and need to find a website that says when the disease was first discovered or how long we have known about it.
Tuesday, February 11, 2014 by Krystal

biology
What is a cell
Tuesday, February 11, 2014 by onah

BIOLOGY
CELLS THAT HAVE DNA BUT LACK A NUCLEUS ARE MEMBERS OF THE KINGDOM? A)VIRUSES B)MONERA C)FUNGI D)ANIMILIA E)PROTISTA
Thursday, February 6, 2014 by HELP!!!!

Biology
the carbon atoms in the carbon dioxide gas we breathe out come from molecules of??? please help! incredibly lost!
Wednesday, February 5, 2014 by College Student

biology
The name of a binary compound ends with _____.
Tuesday, February 4, 2014 by Anonymous

Biology - please help
A portion of DNA has the following sequence: ATACCG. What number of codons would this segment code for? A. 6 B. 3 C. 2*** D. 1 I think it is C...?
Tuesday, February 4, 2014 by Cassie

Biology - please help
After a strain of bacterial cells is exposed to a chemical mutagen, only 30% of the cells produce new colonies that continue to grow. Which of the following can be concluded? A. Some cells underwent advantageous mutations. B. Some cells underwent neutral mutations. C. Some ...
Tuesday, February 4, 2014 by Cassie

Biology
A portion of DNA has the following sequence: ATACCG. What number of codons would this segment code for? A. 6 B. 3 C. 2*** D. 1 I think it is C...?
Tuesday, February 4, 2014 by Cassie

Biology
After a strain of bacterial cells is exposed to a chemical mutagen, only 30% of the cells produce new colonies that continue to grow. Which of the following can be concluded? A. Some cells underwent advantageous mutations. B. Some cells underwent neutral mutations. C. Some ...
Tuesday, February 4, 2014 by Cassie

Biology:Genetics
In guinea pig, short hair (L) is dominant to long hair (l) and the heterozygous condition for yellow coat (Y) and white coat (y) gives cream coat. A short haired guinea pig is bred to long haired white guinea pig and one of the offspring is a long haired baby guinea pig. a. ...
Tuesday, February 4, 2014 by Jez

Biology: Genetics
In guinea pig, short hair (L) is dominant to long hair (l) and the heterozygous condition for yellow coat (Y) and white coat (y) gives cream coat. A short haired guinea pig is bred to long haired white guinea pig and one of the offspring is a long haired baby guinea pig. a. ...
Tuesday, February 4, 2014 by Ethan

Biology
What type of cells do not regenerate after birth?
Saturday, February 1, 2014 by Angela

Biology/Science
1. A corn plant over the course of a summer can weigh 500 grams (dry biomass, after removing the water), yet it starts from a seed that weighs less than 1 gram. What is the primary source of this increased mass? What process(es) are responsible for the gain in mass? Explain. 2...
Saturday, February 1, 2014 by Anonymous

Biology
During the ______ pathway, a host cell infected with a virus lyses and releases new virus particles. During the _______ pathway, viral DNA replicates along with the cell, but new viruses are not immediately produced. Please help!
Thursday, January 30, 2014 by Sarah

Biology
Viroids typically infect plant, while prions typically infect nervous system. Is this correct? thanks!
Thursday, January 30, 2014 by Sarah

Biology- Scientific Method
An experimenter sets out to find out how many hours of sleep a dog needs in order to catch the highest number of balls without a bounce. To test this the experimenter uses 5 dogs in the experiment and allows each dog to sleep a predetermined amount of time: dog 1: 4 hrs, dog 2...
Thursday, January 30, 2014 by Emily

human and social biology
what causes the decreases of the oestrogen levels and on which days of the cycle it occured?
Wednesday, January 29, 2014 by kay

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Homework Help: Science

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