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Biology Science Chemistry Physics

04/02/20

How many grams of Li3N can be formed from 12.1 grams of Li? Assume an excess of nitrogen (N2). 6 Li(s) + N2(g) → 2 Li3N(s)

Formula: 6 Li(s) + N2(g) → 2 Li3N(s)

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Biology Science Chemistry Physics

04/02/20

According to the following balanced reaction, how many grams of NO are formed from 388 grams of NO2 if there is plenty of water present? 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g) (Please help Urgent)

Formula: 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)

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Biology

04/01/20

Techniques used for gene related methods

2. This technique can be used to determine whether or not a particular gene is transcribed in a specific tissue or cell type?Southern/ RNA-seq/ Western/ In situ immunofluorescence/ Expression... more

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Biology Genetics

04/01/20

Calculating Allele Frequency

In the plant species Grandi floria, most individuals have large flowers. However, plants that are homozygous recessive at the G allele have small flowers. If there are 75 plants with large flowers... more

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Biology

03/31/20

Absorbance and protein concentartion

If tube B has an absorbance value of .158, what is the diluted protein concentration?y=.8543x + .0375

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Biology Math Chemistry Genetics

03/31/20

I need help solving this... Dont exactly know how to solve/set this up.

A geneticist puts a female mouse from a line that breeds true for wild-type eye and body color with a male mouse from a pure line having apricot eyes (determined by allele a) and gray coat... more

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Biology Ap Biology

03/31/20

Why is A, T, C, G and U called the universal code? Why are proteins important to living things? Explain!

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Biology Botany

03/31/20

how to determine the amount of water absorb by a seed ?

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Answers •2

Biology Ap Biology

03/30/20

Describe how the structure of each of the four major macromolecules determine the properties and function for each molecule type.

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Biology Psychology Physiology Pharmacology

03/30/20

When molecule A and molecule B are added to the cells, Inositol Triphosphate level decrease. What is molecule b?

context: when molecule A is added to the cells, increased levels of the 2nd messenger (inositol triphosphate (IP3) are detected. The receptor molecule A is binding to is Alpha 1 receptor and the... more

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Biology

03/29/20

Speciation is best describes as

Speciation is best describes as *A group of similar organisms that can breed and produce fertile offspringWhen there is a rise in two or more species from a single existing speciesA group of... more

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Biology Science Chemistry Psychology

03/28/20

The bonding of Acetylcholine to its muscarinic receptors on smooth muscle causes gated K+ channels to close. This action is described as what?

Would it be inhibitory or excitatory and would the cell depolarize or hyper-polarize?

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Biology Chemistry Human Physiology

03/28/20

During fight and flight response, elevated levels of epi and norepi stimulate less sensitive alpha receptors and beta receptors on smooth muscle of blood vessels. How does this impact blood flow?

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Biology Phenotypes Intrasexual Selection

03/28/20

Biology question

Define and give a detailed example of intrasexual selection. How will this affect the phenotypes of subsequent generations?

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Biology Physiology Human Biology Human Physiology

03/28/20

During the fight and flight response, elevated levels of epinephrine and norepinephrine stimulate less sensitve alpha receptors as well as beta receptors on smooth muscle of blood vessels.

How does this impact blood flow?I believe it impacts blood flow by redirecting from the GI tract and kidneys to skeletal muscle. Can someone confirm?

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Answers •2

Biology Chemistry Psychology Physiology

03/28/20

Acetylcholine is both an excitatory and inhibitory ligand depending on the location of its receptor. What does acetylcholine do that makes it "Excitatory"?

A. It opens k+ion channels when it binds to its receptorsB. It causes a cell membrane to hyperpolarizeC. It causes a cell membrane to depolarize and produce excitatory post synaptic potentials Im... more

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Biology Psychology Physiology Human Physiology

03/28/20

Which of the following is responsible for facilitating rapid conduction of the wave of depolarization along an axon?

A. Unmyelinated areas of the axon.B. The rate at which the cell membrane returns to RMPC. The duration of the action potential D. The entire duration of the action potentialI chose A. Becuase the... more

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Biology Science Physiology Human Physiology

03/27/20

Action potential

In order for an action potential to be produced at the axon hillock, what has to first happen?A. Sodium ion channels must be inactivated B. ESPS(Excitatory postsynaptic potential) had to have... more

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Biology

03/27/20

Genetics question

If the father's blood group: AB M S and the mother's blood group: O N s What's the possible blood group of children?If the father's blood group: A MN s and mother's blood group: O MN sWhat's the... more

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Biology Genetics

03/26/20

Genetics of blood groups and MHC

With regard to the HLA-A and HLA-B antigens complete the genotypes, haplotypes and decide if themarked man can be the biological father of the child:Phenotype of mother: HLA-A11,36; B8 What... more

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Biology

03/26/20

whats is the relationship between DNA, codons. and, proteins?

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Answers •1

Biology

03/26/20

i need help to draw the graph and explanation

1.Give the report a descriptive and complete title. 2. State the purpose of running the peroxidase reaction at different pH levels. 3. Submit a bar graph constructed on MS Excel showing the effect... more

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Biology Ap Biology

03/26/20

Dinosaurs and birds fossils indicate that both had

A. scales B. wings C. nothing in common

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Biology Ap Biology

03/26/20

How are reptiles, birds and humans most closely related of the characteristics below ?

A. they are caudalsB. they are invertebrates C. they are protosomesD. they are aminotes

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Biology Ap Biology

03/26/20

Which of the following organisms’s fossil would have been a tetrapod?

A. earthwormB. chickenC. alligator D. human

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How many grams of Li3N can be formed from 12.1 grams of Li? Assume an excess of nitrogen (N2). 6 Li(s) + N2(g) → 2 Li3N(s)

According to the following balanced reaction, how many grams of NO are formed from 388 grams of NO2 if there is plenty of water present? 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g) (Please help Urgent)

Techniques used for gene related methods

Calculating Allele Frequency

Absorbance and protein concentartion

I need help solving this... Dont exactly know how to solve/set this up.

Why is A, T, C, G and U called the universal code? Why are proteins important to living things? Explain!

how to determine the amount of water absorb by a seed ?

Describe how the structure of each of the four major macromolecules determine the properties and function for each molecule type.

When molecule A and molecule B are added to the cells, Inositol Triphosphate level decrease. What is molecule b?

Speciation is best describes as

The bonding of Acetylcholine to its muscarinic receptors on smooth muscle causes gated K+ channels to close. This action is described as what?

During fight and flight response, elevated levels of epi and norepi stimulate less sensitive alpha receptors and beta receptors on smooth muscle of blood vessels. How does this impact blood flow?

Biology question

During the fight and flight response, elevated levels of epinephrine and norepinephrine stimulate less sensitve alpha receptors as well as beta receptors on smooth muscle of blood vessels.

Acetylcholine is both an excitatory and inhibitory ligand depending on the location of its receptor. What does acetylcholine do that makes it "Excitatory"?

Which of the following is responsible for facilitating rapid conduction of the wave of depolarization along an axon?

Action potential

Genetics question

Genetics of blood groups and MHC

whats is the relationship between DNA, codons. and, proteins?

i need help to draw the graph and explanation

Dinosaurs and birds fossils indicate that both had

How are reptiles, birds and humans most closely related of the characteristics below ?

Which of the following organisms’s fossil would have been a tetrapod?

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