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3 years ago

How does natural selection lead to evolution

Physics

2 answers:

Sveta_85 [38]3 years ago

4 0

Answer:

A species can gradually change into a new species

Explanation:

I got it right

aliya0001 [1]3 years ago

3 0

Natural selection occurs as the most successful of a particular species pass on their genes while the less successful fail to mate, and undesireable genes die out. this causes evolution over time because if a larger sized animal is desirable for survival, then these animals will find more mates and the next generation will be slightly larger, and they will continue to mate with larger animals eventually causing a larger average size. this works with colours/patterns, intelligence, beak/mouth shapes, things like that.

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In short, Your Answer would be Option B

Hope this helps!

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3 years ago

Read 2 more answers

You measure the power delivered by a battery to be 4.26 W when it is connected in series with two equal resistors. How much powe

gtnhenbr [62]

Answer:

<em>The power delivered by the battery is 17.04 W</em>

Explanation:

Power through a circuit is given as

P = IV ....1

where P is the power

I is the current through the circuit

V is the voltage through the circuit

The voltage in a circuit is given as

V = IR ....2

Let us take the value of each resistor as equal to R

when connected in series, the total resistance will be

$R_{t}$ = R + R = 2R

If we assume constant voltage through the circuit, then from equation 2, the current in this case is

I = V/2R

If the resistors are connected in parallel, then the total resistance will be

$\frac{1}{R_{t} }$ = $\frac{1}{R}$ +

$R_{t}$ = R/2

The current in this case will be increased since the resistance is reduced

I = 2V/R

comparing the two situations, we can see that the current increased when connected in parallel to a ratio of

$\frac{2V}{R}$ ÷ $\frac{V}{2R}$ =

This means that the current increased 4 times

From equation 1, we can see that electrical power is proportional to the current at a constant voltage, therefore, the power will also increase by four times to

P = 4 x 4.26 = <em>17.04 W</em>

3 0

3 years ago