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k0ka [10]
3 years ago
13

___ is the only continent not to experience tornadoes. Africa Antarctica America

Biology
2 answers:
raketka [301]3 years ago
6 0
Antarctica is the only continent not to experience tornadoes
Tomtit [17]3 years ago
3 0
Antartica i think sorry if i’m wrong
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How does the diameter of each ripple change as time passes
VLD [36.1K]

The diameter of the ripple changes by the following equation = \frac{dA}{dt} = \frac{\pi }{2} D . \frac{d(D)}{dt}<u></u>

<u>Explanation:</u>

When a pebble or a rock is dropped in the water then the ripples or waves are formed which starts moving radially outward. As the time passes, the radius of the circle increases.

Let D be the diameter of the circle.

\frac{dD}{dt} will be the rate of change of diameter of the circle with respect to time.

Let A be the area of the circle.

\frac{dA}{dt} will be the rate of change of area of the circle with respect to time.

Area of the circle = \frac{\pi }{4} D^{2}

So,

\frac{dA}{dt} = \frac{d [\frac{\pi }{4}  D^{2}] }{dt}

\frac{dA}{dt} = \frac{\pi }{4} \frac{d[ D(t)^{2}] }{dt}

<u>Using chain rule,</u>

\frac{dA}{dt} = \frac{\pi }{4}  X  \frac{d[D(t)^{2} ]}{d[D(t)]}   X  \frac{d[D(t)]}{dt}

\frac{dA}{dt} = \frac{\pi }{4}  . 2D(t) . \frac{dD}{dt}

\frac{dA}{dt} = \frac{\pi }{2} X D(t) X \frac{d(D)}{dt}

\frac{dA}{dt} = \frac{\pi }{2} D . \frac{d(D)}{dt}

Thus, the following equation determines the change in area in terms of diameter with respect to time :  \frac{dA}{dt} = \frac{\pi }{2} D . \frac{d(D)}{dt}

7 0
3 years ago
Which process is the fastest way to produce copies of DNA?
bagirrra123 [75]

Answer:

It's PCR( Polymerase Chain Reaction)

Explanation:

It's used for quickly generating a sufficient amount of identical genetic material for study and analysis.

Hope this helps :)

8 0
3 years ago
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C

Dangerous substances secreted by bacteria as they grow.

The exotoxins can also cause damage to the host by destroying cells.

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4 years ago
The parent cell that enters meiosis is diploid, whereas the four daughter cells that result are haploid. Which statement correct
UNO [17]

Answer:

I snatched this from someone else, so it isn't mine, but I hope it helps. They don't have a username so I cannot credit them.

Explanation:

DNA content is halved in both meiosis I and meiosis II. Ploidy level changes from diploid to haploid in meiosis I, and remains haploid in meiosis II.

During anaphase of both meiosis I and meiosis II, the DNA content (number of copies of chromosomes) in a cell is halved. However, the ploidy level changes only when the number of unique chromosome sets in the cell changes. This occurs only in meiosis I (where separation of homologous chromosomes decreases the ploidy level from 2n to n and produces daughter cells with a single chromosome set).

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The Calvin cycle produces a versatile chemical compound called ____________ , which can be converted to many carbohydrates, as w
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