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Homework Help: Science: Biology

Recent Homework Questions About Biology

biology
mention some tests 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.

Biology -Genetics
True or False X and Y chromosomes are found only in eggs and sperm. T or F ?

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 ...

Biology
Which earthworm organ serves excretory function by excreting metabolic waste?

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?

Biology
What are secondary consumers considered as? Are the carnivore, omnivore, herbivore. Hint: there are two answers

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

biology
list all the molecules in the process transcription

BIOLOGY
Can an individual organism change its own genes?

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.

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

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. ...

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. ...

biology
complexity of asexual and sexual

Biology
5 reasons why conservation of natural resources are important

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 ...

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-...

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

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?

BIOLOGY
In natural selection why do animals die? Why do some animals die while others thrive? Why do phenotypes of a population change?

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?

BIOLOGY
GIVE AN EXPLANATION OF "SIMILARITIES IN EMBRYOLOGY" give an exclamation for geography as known as distribution of organisms

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?

biology
what is hypertonic and how does it happen

biology
what is the hypertonic hypotonic isotonic ,

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.

biology
how can i make my carier in torism

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.

biology
What is a cell

BIOLOGY
CELLS THAT HAVE DNA BUT LACK A NUCLEUS ARE MEMBERS OF THE KINGDOM? A)VIRUSES B)MONERA C)FUNGI D)ANIMILIA E)PROTISTA

Biology
the carbon atoms in the carbon dioxide gas we breathe out come from molecules of??? please help! incredibly lost!

biology
The name of a binary compound ends with _____.

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...?

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 ...

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...?

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 ...

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. ...

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. ...

Biology
What type of cells do not regenerate after birth?

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...

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!

Biology
Viroids typically infect plant, while prions typically infect nervous system. Is this correct? thanks!

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...

human and social biology
what causes the decreases of the oestrogen levels and on which days of the cycle it occured?

scince biology
us desh ka naam likiye jaha se tamaku ka sevan shuru hoo

earth (or Biology?)
You collect some pond water and filter out the different organisms into separate jars. You add no food to the water, but one kind of organism is still alive long after the others have died. That species is best described as being _________.

biology
In which stage of mitosis does DNA replication occur?

biology
How many chromosomes does a child have, excluding the sex chromosome?

biology
similar abd difference between photosynthesis and cellulaR RESpiration

biology
are theories temporary ideas and i don't understand the dictionary def

biology
Which list shows the correct order of locations and steps in protein processing? A. 1. endoplasmic reticulum (protein modification) 2. Golgi apparatus (protein packaging) 3. ribosome (protein synthesis) B. 1. ribosome (protein synthesis) 2. endoplasmic reticulum (protein ...

biology PLEASE ASSIST!!
1.The structure and functions of the cell are controlled by what??? 2.Explain why DNA is able to play a role in the transmission of hereditary information. 3.State TWO functions of DNA 4. Explain how genetic fingerprinting can be used to prove is the identity of the father of ...

biology
What is the genetic code? a) the order of amino acids in proteins makes up the genetic code b) the order of amino acids in mRNA makes up the genetic code c) the order of nitrogen bases in tRNA makes up the genetic code d) the order of nitrogen bases in DNA makes up the genetic...

biology
Name any 3 mineral elements that are required for the formation of membrenes.

Biology
O2 is a product of: A. light-dependent reactions. B. light-independent reactions. C. light-capturing events. D. All of the choices are correct. Is the answer D?

Biology
What does the cardiovascular systems consist of?

Molecular cell Biology
The following chemicals have the indicated formula weights:Sucrose-342.3,Potassium dihydrogen phosphate(KH2PO40-136.09,Tris -121.14.You also have the following solutions made:20%SDS,5M NaCl,500mM EDTA.You have a 40%glycerol solution and 10X TBE.List the steps to make the ...

biology
Pls what is the relationship between biology and agriculture

Biology
Microorganisms develop resistance to antimicrobial drugs in a number of ways, EXCEPT A. Producing an enzyme that deactivates the antimicrobial drug B. Changing the cellular permeability to prevent the drug from entering the cell C. Interfering with the cell wall synthesis of ...

Biology
Can you give me a website to go on to go over how to know whether you double or half the number of chromosomes given in a scenario? Thank you so much! I have a quiz tomorrow and I need all the help I could get!

Biology
Explain the relationship among muscles, bones and joints

Biology
Explain the differences between voluntary and involuntary muscles

Biology
Discuss the classifications of muscles according to their actions

Biology
Differentiate the three classifications of muscles

Biology
Describe how the muscle work in the human body

biology
draw a diagram that shows the chromosome combinations that are possible in the haploid gametes of an organism with a diploid number of 6

biology
Can someone help? I don't understand gene regulation. The regulation of protein synthesis in cells involves the coordination of several different mechanisms. Discuss TWO of the specific mechanisms of gene regulation in eukaryotic cells from the list below and describe how the ...

Biology
I'm in 4th grade to i need to write a hypothesis on "why do some people have similar dominant traits? i don't know how to write that either?

Biology
what would be a good starting sentence for a hypothesis "why do some people have similar dominant traits?"

biology
Given below is the sequence of the mRNA ready for Translation" 5' - AUG CUA UAC CUC CUU UAU CUG UGA - 3' a) what is the first codon technically known as and which amino acid does it code for? b) how many amino acid residues will make the polypeptide chain corresponding to this...

biology
list at least three other factors that could reduce bias in an experiment

Biology
Identify/ name at least 1 biological science problem and prepare a procedure on how to solve such problem then recommend solution.

Biology
How will you prepare a laboratory procedure to verify the validity of the hypothesis. Give Example.

Biology
Why is a control set-up being done in the conduct of an experiment. Give Example.

Biology
Why is there a need for a scientist to know the limitations of Science?

Biology
How could you repair an electric fan that is not working properly? Apply Scientific Method.

Biology
Why do elderly people experience cold intolerance when they in fact have increased adipose tissue and more lipid storing area? I mean I know temperatures of the body is regulated by the hypothalamus along with the thyroid and all .. but what i always thought a person with more...

Biology
The cell membrane is a highly selective barrier that controls the movement of substances in and out of the cell. In fact, polar molecules are unable to go across unless

biology - natural selection
Which of these is the foundation for relative dating? A. Earth is very old. B. Deeper rock strata are older. C. Radioisotopes decay at a constant rate. D. Organisms can be closely related to each other.

biology
Research the enzyme catalase. What is its function in the human body?

biology
1. Why might the enzyme activity decrease at very high temperatures? 2. Why might a high fever be dangerous to humans? 3.What is the optimal temperature for enzymes in the human body?

biology
explain what is the carbon cycle and why its called a cycle *explain four "moves" that occur in this cycle * explain the importance of this cycle to organisms *explain the human impact and effects on this cycle when fossil fuels are burnt

biology
explain what is the carbon cycle and why its called a cycle *explain four "moves" that occur in this cycle * explain the importance of this cycle to organisms *explain the human impact and effects on this cycle when fossil fuels are burnt

biology
which of these would lead to an increase in carbon dioxide in the atmosphere a- decrease in animal respiration b- decrease in plant respiration c- an increase in photosynthesis d- an increase in auto and factory emissions 2. which activity occurs during the process of ...

biology
On a television talk show, a guest claims that people who exercise vigorously for 15 minutes or more every day are able to solve math problems more rapidly than people who have no vigorous exercise in their daily routine. Describe a controlled experiment that could be ...

biology
After a family picnic, Ella dumped the ice and rock salt from the ice cream maker in the back yard. That area of yard now contains dead, brown grass. Explain why this happened, and use the words hypotonic, hypertonic, and plasmolysis in your explanation

biology
Gene cloning can involve inserting genes into A. machines. B. humans. C. plants. D. protein. this is not D, and i don't think it's A. if i had to guess, i'd pick C but i'm unsure if it could be B as well.

Biology
***I read the textbook assignment and I have read all the information on the lesson, however I cannot find the answer to this question. Nor can I find anything written about it anywhere in the lesson. Please help a girl out.*** True or False? There are many origins of ...

Quick Biology help
Which two factors can cause cancer cells to form? What can be made by cells that divide too fast?

biology
Generally,mankind( I believe across all cultures) prefers to eat foods that are served hot or sometimes chilled.I have the impression that it should be more natural,beneficial and tastier to eat food as it is i.e. at room temperature, as what other animals do. Our body ...

Biology
Why is feedback inhibition a useful thing for enzyme reactions in a cell? Are there biology tutors in this forum??

Biology
Which one has no place with the others? -glormerulus -secretion -filtration -increased blood presure

Biology
How many chromosomes are in a human blood cell? What term describes a picture of the human chromosomes arranged in pairs?

Biology
1) What is free gibs? 2)What is energy carriers? 3)If the inner membrate of the mitochondria leaks hydrogen what will happen?

biology
Explain how the Punnett Square is related to probabilities, and describe what different regions of a Punnett Square represent

BIOLOGY
Name and discuss the levels of organization in a multicellular organism starting from the basic unit or structure of life.

BIOLOGY
How is the evolution of animals the long necked giraffe explained by Charles Darwin?

BIOLOGY
Compare the basic principles on which the Darwin’s natural selection and Lamarck’s concepts of evolution are based.

BIOLOGY
Differentiate plants from animals based on the following: structure, locomotion, irritability, metabolic process, waste products, growth and development, outer covering and food making processes.

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