All categories

3 years ago

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

Biology

2 answers:

agasfer [191]3 years ago

8 0

The correct answer is sprained ankle.

Functional MRI uses rays that is used to study the brain activity which is associated with the movement of blood flow. This is least likely to be affected by the sprained ankle.

Firstly, Functional MRI is used for checking the working of brain activity it has nothing to do with sprained ankle.

Secondly, there is no as such medication given in case of sprained ankle will effect the activity of brain.

Rudiy273 years ago

5 0

The answer is C. sprained ankle 100%

You might be interested in

“Friendly" microbes secure a place to live and grow,

seraphim [82]

Answer:

yes because this positivley affectz both friendly microbes

3 0

2 years ago

Other than the genus and species information, what characteristics do most of the top hit sequences share? select the two best a

gogolik [260]

The characteristics that most of the top hit sequences share are; They contain a ribosomal RNA (rRNA) sequence. Additionally, they contain a sequence of an internal transcribed spacer. The ribosome is a cellular machine found in all organism. It serves to convert the instructions found in messenger RNA into the chains of amino-acids that make up proteins. The ribosomes is responsible for the synthesis of proteins. Internal transcribed spacer refers to the spacer DNA situated between the small-subunit ribosomal RNA and large-subunit rRNA genes in the chromosome or the corresponding transcribed region in the polycistronic rRNA precursor transcript.

5 0

3 years ago

Which information is needed to construct a geomagnetic time scale?

AleksAgata [21]

Answer:

the magnetic direction of rocks along the surface of Earth and the age of rocks along the surface of Earth

Explanation:

The earth's magnetic field or geomagnetic field is believed to originate from the movement of molten iron and nickel in the outer core.

During a period in which the earth magnetic field is normal, crystallising magnetic minerals in magma records the orientation of the prevailing geomagnetic field. At other times when the field reverses and the magnetic field orientation changes, magnetic minerals in cooling magma stores this record.

To create a geomagnetic time scale, geologists can assign absolute ages to the records of these paleomagnetic anomalies which are the reversals. The rock is dated using radiometric techniques and each period of reversal is ascribed an absolute geologic age. Therefore, the magnetic direction of rocks along the surface of Earth and the age of rocks along the surface of Earth helps to build the geomagnetic time scale of the earth.

3 0

2 years ago

A train rumbles along the tracks at high speed.

Nutka1998 [239]

Answer:

Mechanical --> Thermal

Explanation:

4 0

2 years ago

Read 2 more answers

A genetically heterogeneous population of rice has a mean in the number of days to maturation of 30. Selection for decreased per

chubhunter [2.5K]

Answer:

h² = 0.6

Explanation:

Before answering the question, we need to know a few concepts.

Artificial selection is the selecting practice of a specific group of organisms in a population -that carry the traits of interest- to be the parents of the following generations.

Parental individuals carrying phenotypic values of interest are selected from the whole population. These parents interbreed, and a new generation is produced.

The selection differential, SD, is the difference between the mean value of the trait in the population (X₀) and the mean value of the parents, (Xs). So,

SD = X₀ - Xs

Heritability in the strict sense, h², is the genetic component measure to which additive genetic variance contributes. The heritability might be used to determine how the population will respond to the selection done, R.

h² = R/SD

The response to selection (R) refers to the metric value gained from the cross between the selected parents. R can be calculated by multiplying the heritability h², with the selection differential, SD.

R = h²SD

R also equals the difference between the new generation phenotypic value (X₁) and the original population phenotypic value (X₀),

R = X₀ - X₁

-------------------------------------------------------------------------------------------------------------

Now that we know these concepts and how to calculate them, we can solve the proposed problem.

Available data:

You are selecting rice´s decreased period of maturation.
The population of rice has a mean maturation time of 30 days → X₀
Parental selected average period to maturation is 25 days → Xs
F1 plants mature on average in 27 days → X₁
N arrow sense Heritability → h²

According to what we sow previously, we need to find out the value of h².

We know that h² = R/SD, so we need to get R and SD first.

R = X₁ - X₀

R = 27 - 30

R = -3

SD = Xs - X₀

SD = 25 - 30

SD = -5

Knowing this, we can calculate h²

h² = R/SD

h² = -3/-5

h² = 0.6

7 0

2 years ago