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3 years ago

The presence of ___________ is the key difference between gray and white matter.

1 answer:

6 0

I believe it is the "myelin sheath." White matter = myelinated (has myelin sheath), while gray matter = unmyelinated (no myelin sheath)!

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Wheat production W in a given year depends on the average temperature T and the annual rainfall R. Scientists estimate that the

Nimfa-mama [501]

Answer:

-1.1

Explanation:

Data provided in the question:

Average temperature is rising at a rate, $\frac{dT}{dt}$ = 0.15°C/year

Rate of change rainfall, $\frac{dR}{dt}$ = - 0.1 cm/year

$\frac{\delta W}{\delta T}$ = -2

$\frac{\delta W}{\delta R}$ = 8

Now,

we need to calculate $\frac{dW}{dt}$

since,

The wheat production (W) is dependent on the rainfall (R) and the Temperature (T)

thus, Using the chain rule , we have

$\frac{dW}{dt}$ = $\frac{\delta W}{dT}\times\frac{dT}{dt}$ + $\frac{\delta W}{dR}\times\frac{dR}{dt}$

on substituting the respective values, we get

$\frac{dW}{dt}$ = -2 × 0.15 + 8 × (-0.1)

$\frac{dW}{dt}$ = -0.3 - 0.8

$\frac{dW}{dt}$ = -1.1

3 0

3 years ago

Need help ASAP! Brainliest will be GRANTED to the CORRECT answer!

Natasha_Volkova [10]

the correct answer would be b. lower permeability

7 0

3 years ago

Why do the cells inside of your stomach get replaced every few days , but other cells in your body can live for weeks, months or

Colt1911 [192]

Answer:

hi, this is the answer of your question

the cells that line your stomach can renew as fast as every two days, because they in contact with digestive acid.

8 0

3 years ago

Glucose is a large molecule that cannot penetrate the phospholipid bilayer of cells. Instead, glucose enters most cells through

bagirrra123 [75]

The term is Facilitated diffusion.

Facilitated diffusion is a transport mechanism in which carrier proteins shuttle molecules across the cell membrane without using the cell's energy, and because it does not use the cell's energy, it is a passive transport.

The energy is provided by the concentration gradient, which means that molecules are transported from higher to lower concentrations, into or out of the cell.

The carrier proteins of the GLUT family are responsible for transporting glucose. They bind to glucose , which causes them to change shape to fit in the membrane passage then they translocate the glucose molecule from one side of the membrane to the other.

Red blood cells use facilitated diffusion to absorb glucose.

5 0

3 years ago

Protist reproduction

solong [7]

Answer:

e. is mostly asexual, with sexual as a second option.

Explanation:

Protist are unicelluar eukaryotic microorganims. Example include:

Amoeba proteus

Euglena viridis

Dinoflagellates, etc.

Among the species of Protists, each species exhibit a unique way of reproduction. Generally, in Protist there are two types of reproduction, these are asexual reproduction and sexual reproduction. With asexual reproduction being the primary mode of reproduction in most protists.

Protist reproduce asexual by binary fission or by budding.

Binary fission occurs when a single protist divides its nucleus and then divides itself into two separate organisms.

Budding occurs when a new organism grows from the body of the parent organism. The new organism may separate from the parent or remain attached, forming colonies.

They also reproduce sexually by conjugation.

Sexual reproduction by conjugation requires two parent organisms contributing to the genetic material of the offspring. The essence of conjugation is to produce a new offspring with a wider genetic variability i.e the offspring being genetically different from the parent organisms.

4 0

3 years ago