4,064 Answered Questions for the topic biology

Biology Microbiology

03/30/21

How does the position of the mouth differ between the panarian,tapeworm, and fluke?
Planarians are on the underside but not seeing the differences with the other two
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03/29/21

Determine the concentration of the acid
The flask contains 25mL of an unknown diprotic acid aqueous solution that reacts in a 1:2 stochiometric ratio with NaOH. Tritrate the solution with NaOH to determine the concentration of the acid.
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03/29/21

Determine unknown volume 
Calculate the volume of 6.93x10^-2 M calcium hydroxide required to neutralize 28.2 mL of a 0.147 M hydrochloride acid solution.
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03/29/21

Use Use primary standard to determine unknown concentration 
Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand... more
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03/29/21

What happens during muscle contraction in a muscle fiber?
I basically want to know what happens microscopically in a muscle fiber when muscle contraction occurs?
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03/28/21

Use primary standard to determine unknown concentration

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand... more
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Expert Answers •1

03/28/21

Determine unknown volume

Calculate the volume of 6.93x10^-2 M calcium hydroxide required to neutralize 28.2 mL of a 0.147 M hydrochloride acid solution.
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Expert Answers •1

03/28/21

Determine the concentration of the acid
The flask contains 25mL of an unknown diprotic acid aqueous solution that reacts in a 1:2 stochiometric ratio with NaOH. Tritrate the solution with NaOH to determine the concentration of the acid.
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Expert Answers •1

03/27/21

Which Type of Statistical Test Do I Choose From for Finding Optimum, and How Would I Calculate It?
So currently I am working on a study about carrying concentrations of Aloe vera gel % and how it affects the growth density of probiotics (in OD640 units) to find out which concentration of Aloe... more
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Biology Biochemistry

03/26/21

Leopard species

What evidence of evolution supports that the Indochinese and North Chinese leopards are the common ancestors of the Amur leopard
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Biology Biochemistry

03/26/21

Leopard species
1) what are two closely related ancestors of the Amur leopard2) What is the evidence of evolution for Amur leopard, Indochinese leopard, and North Chinese leopard?3) How are Amur leopard,... more
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Biology Chemistry

03/25/21

Anyone :D.........
What are the limits and merits of your work in modeling and explanation of this reaction? 
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03/25/21

Describe the strategies behind the discovery of Artemisinin and Ivermectin?
Explain the discovery of artimisinin and how etnopharmacological knowledge was used, and explain the discovery of Ivermectin and the strategy behind that involving screening of products from... more
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Biology Chemistry

03/25/21

Hope someone answer!!
When 100 grams of HCl reacts with 80 grams of Mg(OH)2 (a total mass of 180 grams), then 50 grams of MgCl2 is produced. How many grams of H2O will also be produced?
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03/25/21

Hola I need so much help with my chemistry homework please can someone actually help me as soon as possible please

1.) 3 Cu + 8HNO3 → 3 Cu(NO3)2  + 2 NO + 4 H2OIn the above equation, how many grams of water can be made when 4.3 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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Biology

03/24/21

What compares all the wavelengths of light?
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Biology Science

03/24/21

Differentiate a dependent and an independent variable when doing an experiment.
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Biology

03/24/21

What is the best reason a present day organism is very similar to its ancestor?

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Biology

03/24/21

Trace the path of blood through the mammalian heart starting with the Right Atrium
Trace the path of blood through the mammalian heart starting with the Right Atrium. Use the following terms: Aortic Arch, Aortic Similunar Valve, Bicuspid (Mitral) Valve, Body, Descending Aorta,... more
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Biology

03/24/21

I hope someone sees this today
A certain form of muscular dystrophy is inherited as a sex-linked,recessive gene. Jack has muscular dystrophy. (Neither of his parentshas this disease.) Jane, Jack’s wife, does not have... more
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Biology Anatomy

03/23/21

What would be the effect of blockage of the left subclavian trunk?
An infection with a tropical parasite may block a lymphatic vessel. What would be the effect of blockage of the left subclavian trunk?
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Biology

03/23/21

A unicellular life that does not contain any membrane-bound compartments but does contains a single circular chromosome. This organism might be from the Domain:
Answer is within the following:a. Eukarya but not Bacteria or Archaea.b. Archaea or Bacteria but not Eukarya.c. Bacteria but not Archaea or Eukarya.d. Archaea but not Bacteria or Archaea.e. It... more
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Biology

03/23/21

The rough endoplasmic reticulum and Golgi apparatus would be highly active in a cell that is:
Answer is within the following options:a. Making various lipids for the cell.b. Making protein hormones to be secreted outside of the cell.c. Digesting material within the cell.d. Swimming via a... more
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Biology

03/23/21

Which of the following conditions outside or inside of a dividing cell would most likely cue the molecular regulatory system to activate a stop in the cell cycle (cell cycle arrest)?
The answer is within the following options:a. Chromosomes are fully condensed at the end of prophase.b. Cytokinesis is occurring as telophase is underway.c. DNA replication of some chromosomes is... more
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Biology

03/23/21

Enzymes belong to the _________ class of molecules and their role is to _________ .
Options are within the following:a. Carbohydrate; Protect the body.b. Protein; Help speed up chemical reactions.c. Protein; Protect the body.d. Carbohydrate; Help speed up chemical reactions.
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