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Ostrovityanka [42]

4 years ago

14

what happens when a magnesium atom loses an electron in its outer energy shell? A. it has an increase in number of neutrons. B.

it becomes a negative ion. C. it has an increase in the number of protons. D. it becomes a positive ion.

1 answer:

liberstina [14]4 years ago

6 0

<span>D. it becomes a positive ion.</span>

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A population of wolves migrates north in search of food. as the wolves travel, they enter a region that has long, snowy winters.

Nookie1986 [14]

This is the case of selective pressure of environmental factors like snow, due to which favored the expression of the allele that formed white coat phenotype. This is not a Hardy-Weinberg principle, in which no selective pressure is applied. The relative frequencies of the alleles change in the gene pool, due to selective pressure, and the expressed alleles are often significant for survival in those conditions.

3 0

3 years ago

Which of the following statements about receptor potentials is FALSE?a.Odor molecules can act as stimuli.b.The receptor potentia

bekas [8.4K]

Answer:

The correct answer is option b. "The receptor potential is carried by neuroglia".

Explanation:

Neuroglia is a term used to describe a class of cells which main function is to support the neurons. The term neuroglia include astrocytes, ependymal cells and oligodendrocyte. It is false to affirm that the receptor potential is carried by neuroglia, the receptor potential is carried out by the neurons.

4 0

4 years ago

Read 2 more answers

A communications satellite transmits a radio wave at a frequency of 9.4 x 10^9 Hz. What is the signal’s wavelength? Assume the w

sergejj [24]

To calculate this we will use the light equation:
$c=$ λ $*f$

We have Frequency $f=9.4* 10^{9}Hz$ .
We know that speed of light in vacuum is $c =3.8* 10^{8} m/s$ .
Since a unit of speed of light is m/s, we can change the unit of frequency Hz to 1/s, since Hz means cycles per second (f=1/T).

So:
$f=9.4* 10^{9}1/s$
<span> $c =3.8* 10^{8} m/s$
</span>
<span> $c=$ λ $*f$
</span>⇒ λ $= \frac{c}{f}$
⇒ λ $= \frac{3.8* 10^{8}}{9.4* 10^{9}}$
⇒ <span>λ</span> $=0.04 m$

5 0

4 years ago

Looking at the nesting data table below, how many nests would you predict will be laid in September 2009?

sweet [91]

That would be 29 because if u look at all the other years at the end of all the years the number is only a few numbers up from the first number.

8 0

4 years ago

ASAP WILL GIVE BRAINLIEST

Mashcka [7]

Answer:

Retractable claws.

Explanation:

The farther down the line from the common ancestor, the fewer the animals that share that characteristic.

7 0

4 years ago