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Homework Help: Science: Biology

Recent Homework Questions About Biology

Biology
A life cycle in which organisms switch back and forth between diplid and haplid stages?

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?

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

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?

biology
if you want to make 50 ml of a 1x TAE solution fro a 50X stock, how would you prepare it?

Biology
number of water molecules produced when 14 amino acids are join to form a polypeptide bond?

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

biology
you added 3ml stock solution of 0.05mg/ml of dye and 7ml of water, what will be the final concerntration.

Biology
What is the path that electrons take in C3 photosynthesis?

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?

biology
a. what are the composition in nutrient broth? b. give 5 different types of media used for cultivation of microbes and define each?

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 ...

biology
what kind of bond holds the hydrogen to the oxygen in one water molecule??

Biology
how many grams of sucrose would I need to make 350mL of an 18% solution?

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

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

biology
If allele frequencies change, natural selection must be acting in some way. True or False?

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 ...

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?

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?

Biology
DNA is a nucleic acid made up of monomers called A. nucleotides B. polypeptides A?

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?

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

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 ???

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?

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.

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 ?

biology
what role doescarbon dioxide play in plant processes

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 ...

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

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

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 ...

biology
Which of the following organs remove nitrogenous waste from the body? a. Liver b. Large Intestine c. Kidneys d. Gall Bladder

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 ...

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 ...

DAV; subject biology
What are bio - degradable pollutant?

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...

biology
Which is an ion found in a glass of water? i think it would be oxygen, correct?

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...

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?

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.

Biology
I have a question on plant science, wondering where I can get the answer..

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.

Biology
what is the definition of respiration?

Biology
What is DNA replication?

biology
Can you please explain this to me? List all the possible genotypes of a pea plant with purple flowers and round seeds.

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

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

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 ...

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 ...

Biology science
What is the nature of the phloem vessels after they are stained in the microscopic sections

Biology
State the changes that occur in arterioles in the human skin during thermoregulation

Biology
What's the importance of destination in a mammal

biology
How can the absence of starch in the elaborated sap be explained knowing that it is produced by photosynthesis ?

biology
How can the absence of starch in the elaborated sap be explained knowing that it is produced by photosynthesis ?

Biology
State the cell theory as we understand it today.

Biology
What is the purpose of control in a scientific experiment.

Biology
1. Why water potential values are negative? 2. Why turgidity is so important for plant cell?

Biology
What are electronic wastes?

Biology
The anticodon for GCG is: A) AUA B) CCT C) UAU D) CGC **D

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?

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 ...

Biology
what does ribosome mean in simple english?

Biology
Refer to the illustration above.wich point on the graph indicates approximate world population in the year 1950

physics biology chemistry and ict
WHAT ARE THE ALLOTROPES OF ANTIMONY

Advanced Biology
What process is being described" -the manufacture of carbohydrates, fats, and proteins -the taking in of water, food, and ions I cannot find these for the life of me. Thanks in advance.

English
1. The greeks believed that zeus, the king of the gods, lived on mount olympus. 2. The titanic sank after hitting an iceberg off the coast of newfoundland. 3. My cousin collects scandinavian pottery. 4. Stephanie is taking english, math II, and biology. 5. On friday we were ...

biology
All of the cells are in the very early stages of embryonic development and have not begun to differentiate into specialized types of cells. What type of cells would these be? A) gametes B) stem cells C) somatic cells D) epidermal cells

Biology
All of the cells are in the very early stages of embryonic development and have not begun to differentiate into specialized types of cells. What type of cells would these be?

Psychology Final Exam
Check my answers? Thank you, in advance! 1. When we learn to understand the mind and feelings, we can also learn to ________ and _________ behavior. (1 point) predict and control********* understand and explain eliminate and forget explain and describe 2. Phrenology is based ...

biology
1) Gene regulation in eukaryotes a) usually involves in operons b) is simpler than in prokaryotes c) allows for cell specialization d) includes the action of an operator region i think its C can you please explain to me why it is c or why it isnt if i got it wrong? thank you.

biology
A man is heterozygous for two genes (R and L) that are located on different chromosomes. Which of the following processes would result in different combinations of the alleles for these two genes in his sperm? a) fertilization b) independent assortment c) recombination d) ...

biology help
The features listed above describe what type of cell? Unicellular Has a cell wall May have flagella Single chromosome Ribosomes for protein synthesis

Science , Biology
Which creatures live on the energy of the Sun? Angel fish Suquirrel fish Sea urchins Porcupine fish Octopus

Science , Biology
Is Atlantic spadefish Nocturnal or Diurnal? Carnivore, Herbivore, Autotroph? Is Porcupine fish Carnivore, Herbivore, Autotroph? Please give me informationsss!!

Biology
What are the key characteristics of a model organism? Name atleast 3 different model organisms used in genetics.

Biology
Mendel described two important genetic ideas: inheritance of acquired characteristics and the principle of independent assortment. Provide a brief description of what each one means.

Science/Biology/Health and Social Care
What would happen if the body didn't have any energy? I have looked at Anabolism and Catabolism but I am overall, stuck answering this fully.

biology:cells
which of the following is not true? a. ATP is formed during glycolyisis b. ATP contains less potential energy than ADP*** c. Plant cells generate ATP during cellular respiration d. ATP is used as a mobile energy carrier molecule by all cells which of the following is not true...

Science , Biology
Cretaceous extinction... The evidence tells you that “overwhelming evidence suggests that the extinction was caused by a 10-km-diameter asteroid that struck Earth.” Suggest at least three lines of evidence that might have led scientists to this conclusion. Could you please...

Biology
What do plants and algal cells need to produce proteins? Where do plants and again cells get this supple from? THANKS!!!

Cell Biology
The concept of receptor affinity does not only apply to the original receptor and ligand. For which of the following pairs of interacting molecules in signal transduction would a change in affinity of one for the other NOT affect how they work in signal transduction? A) ...

Biology
The concept of receptor affinity does not only apply to the original receptor and ligand. For which of the following pairs of interacting molecules in signal transduction would a change in affinity of one for the other NOT affect how they work in signal transduction? A) ...

Biology
In a population the proportion of homozygotes in 18 times, the proportion of homozygous recessive. Calculate the frequency of the 2 alleles?

math,physics,chemisty,biology
the number of moles of H2O2 required to completely react with 400ml of 0.5N KMnO4 in acidic medium are

Human and Social Biology
In guinea pigs short hair S,is dominant to long hair. A heterozygous guinea pig mated with a homozygous recessive pure breed. State the proportion of the geno type and the phenotype of the offspring

Biology (please help!!)
Explain the process that takes place in the stroma including and reactants going in nd the products produced from these processes in a. bright sunlight and in b. darkness. c. what happens over an extended period of darkness of many days? What I need to know is part C.. I have ...

biology
Describe how the products of fat digestion enters a person blood?

biology
Why do insects not die if their head is dipped in water

Math
ella took a biology test of 54 question. She got 5/6 with a question correct how many questions did she get wrong on her biology test?

Science, Biology
Can you teach me how should I answer these questions please.. Why the events are significant? First mammals: First primates: First modern humans:

Biology help needed bad!
A biologist discovers a new unicellular organism and classifies it as a prokaryote. The cell is very small, contains a cell membrane, a cytoplasm, DNA in a nucleus, and no other cell organelles. Which statement below represents a correct response to the biologist’s discovery...

Biology
How male circumcion reduces the risk of HIV?

Biology
How is male circumstation reduces the risk of HIV? Explain briefly

Biology
What are 2 advantages for binary fission in bacteria?

Biology
Which of the following best describes the genotypes of the offspring when Mendel crossed true-breeding (pure-breeding) yellow seed plants with true-breeding green seed plants? A) The offspring had a combination of yellow and green seeds. B) The offspring were made up of a ...

biology
How many possible genotypes and phenotypes are there for a single gene trait that shows dominance in any given population?

biology
If the first child of a couple was without dimples, an recessive trait, what is the chance that the second child will be born without dimples? A) 100% B) 25% C) 50% D) Cannot be determined from the phenotype of the child

biology
Which of the following elements is most likely to form an ion that will then form an ionic bond with an ion of a Group 1A element? Be I Fr **my choice Pt

Biology
Has anyone done the effect of cell size on material transport portfolio in Connections academy?

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