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3 years ago

Which factor is least likely to affect the results and interpretation of a functional MRI?

1 answer:

5 0

Prescription medication is the least likely to affect the results and interpretation of a functional MRI.

Here are some of the factors that is most likely to affect the results of MRI :

- Caffeinated soda. Caffeinated soda tend to constrict the blood vessels in the brain, which will affect MRI results.
- cancerous growth, will create a huge shadow on MRI results
- sprained ankle, especially if it was fixed with metal bandage, will cause harm during MRI

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Which trait is unique to birds? Flight Wings Endothermic Feathers

ikadub [295]

Wings is the correct answers

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3 years ago

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How can pollution affect the food chains and the food webs

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Pollution can effect the food chain and the food web In many ways. The first of wich is it can kill off animals. A good example of this is marine life.

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4 years ago

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Identify which organisms can be infected by viruses. Choose one or more: A. Protists B. Bacteria C. Animals D. Plants E. Fungi F

svlad2 [7]

Answer:A. Protists B. Bacteria C. Animals D. Plants E. Fungi F. Archaea

Explanation:viruses are small non-living particles that contains hereditary materials.viruses attack cells of other organisms such as plants , bacteria ,archaea etc.

Viruses are acellular and contains either DNA or RNA.they cannot synthesis protein as they lack ribosomes ,so they use the ribosomes of the cell they have invaded to synthesize they proteins they need.

A virus usually has a central core surrounded by an outer protein coat called capsid.

Viruses can reproduce only within the living host cells and they are specific to the type of cells they attack.they attack plants through insect vectors or through openings on the plants.

Viruses can affect bacteria by injecting their nucleic acids through the cell wall and into the bacteria cell.such viruses are called bacteriophages.

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3 years ago

A solution of acetic acid is prepared in water by adding 11.1 g of sodium acetate to a volumetric flask and brining in the volum

velikii [3]

Answer:

The concentration of

the Acetic Acid is 0.0325M

the Sodium Acetate is 0.1028M

Explanation:

Given

The dissociation of acetic acid is

CH3COOH + CH3COO- + H+ + HA -> A- + H+

We calculate the molarity of sodium acetate by using

Molarity = Moles/Volume

The formula weight of sodium acetate is 82.03 g/mol.

Moles = 11.1g/82.03g/mol

= 0.1353M

Since the volume is 1L, the molarity of sodium acetate will still be 0.1353M

The starting concentration of sodium acetate is 0.1353M

The final concentration of sodium acetate is the starting amount of sodium acetate, minus the amount that was protonated.

Assume that, x = concentration of acetic acid, which is the amount of sodium acetate that was protonated.

From the Henderson-Hasselbalch equation

PH = pKa + log[A-]/[HA]

[A-] = 0.1353 - x

[HA] = x

pKa = 4.75

PH = 5.25

Substitute in these values

5.25 = 4.75 + log(0.1353-x)/x

log(0.1353 - x)/x = 5.25 - 4.75

log(0.1353-x)/x = 0.5

log(0.1353 - x)/x = ½

(0.1353-x)/x = 10^½

(0.1353 - x)/x = 3.1623

0.1353 - x = 3.1623x

0.1353 = x + 3.1623x

0.1353 = 4.1623x

x = 0.1353/4.1623

x = 0.0325M

Therefore [HA] = x = 0.0325M

[A-] = 0.1353 - x = 0.1353 - 0.0325 =

[A-] = 0.1028M

8 0

3 years ago

A student observed cells from an onion root tip in a microscope. The diagram shows her observation. What was happening in the ce

d1i1m1o1n [39]

Answer:

Cell Division!

Explanation:

What is being witnessed is mitosis. That includes your general interphase, anaphase, telophase, metaphase, cytokinesis, etc. These are all part of cell division.

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3 years ago