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3 years ago

Can someone help fill in the blanks please?? ABOUT CHLOROPLAST

Biology

1 answer:

Vesnalui [34]3 years ago

7 0

Chloroplast is plastid in green plant cells which contain chlorophyll and in which photosynthesis take place

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Which hormone can be found in many fruits and can become airborne and cause over-ripening and abscission

nekit [7.7K]

Ethylene is a plant hormone that is released in the form of gas. It stimulates plant cells degradation making the fruits softer and sweeter. As a result, high ethylene levels may cause fruits over-ripening and abscission.

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Why would freezing a balloon full of air causer to shrivel

NikAS [45]

As it gets colder, the molecules get less dense which causes it to get smaller.

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if a adult male bird is 20 feet tall and a baby is 1 quarter of a male adults height how tall is the female if its twice the hei

NNADVOKAT [17]

the baby is 5 feet tall (1/4 of 20)

the female is 10 feet tall (2 times 5)

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3 years ago

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How far away can a proton and an electron be from each other, such that they still exert an electric force on each other of magn

pogonyaev

Answer:

$\sqrt{ \frac{2.3 *10^{-28} }{F} }$

Explanation:

Total force = Force due to gravity + Force due to charges

Total force = $\frac{GMm}{r^{2} } + \frac{kQq}{r^{2} }$

r is the separation between particles.

Charge of a proton(Q) = - (charge of an electron(q) ) = 1.6 * 10^-19 coulombs

Mass of a proton (M)= 1.67×10^-27 kilograms

Mass of an electron (m) =9.11 × 10^-31 kilograms

G=6.67 ×10^−11 N⋅m^2/kg^2

k=8.99 * 10 ^9 N.m^2 / C^2

Plugging in values:

Force due to gravity= (6.67 *10^−11)(1.67 * 10^-27)*(9.11 * 10^-31) /r^2 =1.01 * 10^-67 / r^2

Force due to charges : (8.99 * 10 ^9)*(1.6 * 10^-19)*(1.6 * 10^-19) / r^2 = 2.3 *10^-28 / r^2

We can observe that force due to charges is too large as compared with force due to charge. The ratio of Fc to Fm is 2.3* 10^39. It means that we can ignore force due to gravity.

Total force = Force due to charges.

F = 2.3 *10^-28 / r^2

r = $\sqrt{ \frac{2.3 *10^{-28} }{F} }$

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4 years ago

The term "Protista" in Latin means "the first." Why did biologists use this word as the name for organisms in kingdom Protista?

julia-pushkina [17]

Answer:

I believe that the protists were the first organisms on earth. And the other 5 kingdoms then came from the protists.

I think that's it! :)

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4 years ago