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3 years ago

11

Explain what it means when scientists say that the offspring of sexual reproduction are genetically diverse.

1 answer:

Likurg_2 [28]3 years ago

7 0

Answer: During sexual reproduction, the genetic material of two individuals is combined to produce genetically-diverse offspring that differ from their parents. The genetic diversity of sexually-produced offspring is thought to give species a better chance of surviving in an unpredictable or changing environment

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Ede4ka [16]

Answer:

9758 how many significant figures

3 0

3 years ago

A kettle is rated at 1 kW, 220 V. Calculate the working resistance of the kettle.

Anna [14]

Explanation:

Power of electric kettle, P = 1 kW

Voltage, V = 220 V

(a) Electric power is given by the formula as follows :

$P=\dfrac{V^2}{R}$

R is resistance

$R=\dfrac{V^2}{P}\\\\R=\dfrac{(220)^2}{10^3}\\\\R=48.4\ \Omega$

(b) When connected to a 220 V supply, it takes 3 minutes for the water in the kettle to reach boiling point.

Energy supplied is given by :

$E=P\times t$

P is power, $P=\dfrac{V^2}{R}$

$E=\dfrac{V^2}{R}t\\\\E=\dfrac{(220)^2}{48.4}\times 180\\\\E=180000\ J\\\\E=180\ kJ$

5 0

3 years ago

Which best explains why a wood-burning fireplace represents an open system?

Alona [7]

The answer will be B

5 0

3 years ago

Water is flowing from a garden hose. A child places his thumb to cover most of those outlet, causing a thin jet of high speed wa

Oxana [17]

Answer: maximum height= 40.8m

Explanation: shown in the attachment.

Goodluck

3 0

3 years ago

HOW FAR DOES A UNICYCLE TRAVEL AT A SPEED OF 20 M/S FOR 15 SECONDS?

astra-53 [7]

Given:-

Speed of the unicycle = 20 m/s
Time taken = 15 s

To Find: Distance travelled by the unicycle.

We know,

s = vt

where,

s = Distance travelled,
v = Speed &
t = Time taken.

Therefore,

s = (20 m/s)(15 s)

→ s = (20 m)(15)

→ s = 300 m (Ans.)

8 0

3 years ago