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3 years ago

11

Multicellular organisms reproduce by binary fission. True or False?

1 answer:

ozzi3 years ago

6 0

The answer to this item is FALSE as binary fission or division of cell by two would only occur to prokaryotes or some single - celled eukaryotes. This is a process to which after replicating the genetic materials, there exist two daughter cells which are almost the same in size.

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If a crystal of potassium permanganate is placed on agar and after 15 minutes the diameter of the area over which the dye has sp

Vadim26 [7]

Answer:

Diffusion rate is 1.96 × $10^{-3}$ $cm^{2}$ /s

Explanation:

Diffusion is the process in which the molecules of a substance propagates from a region of higher concentration to region of lower concentration through a semi-permeable membrane.

diffusion rate = $\frac{area}{time}$

Given that; diameter = 15 mm, time = 15 minutes.

The dye spread in a circular form, so that;

area = $\pi$ $r^{2}$

r = $\frac{diameter}{2}$ = $\frac{15}{2}$ = 7.5 mm = 0.75 cm

area = $\frac{22}{7}$ × $(0.75)^{2}$ = 1.7679 $cm^{2}$

time = 15 minutes = 15 × 60 = 900 seconds

So that;

diffusion rate = $\frac{1.7679}{900}$

= 0.0019643 $cm^{2}$ /s

Diffusion rate is 1.96 × $10^{-3}$ $cm^{2}$ /s

7 0

4 years ago

True or false: nutrients are used to break down oxygen and water to release glucose and carbon dioxide

Arturiano [62]

Answer: it is False

Explanation: because nutrients are not used to break down oxygen and water

But these can be broken down in processes such as PHOTOSYNTHESIS ND CELLULAR RESPIRATION.

HOPE THIS HELPS!!!!! NEED MORE EXPLANATION COMMENT IN THE COMMENT SECTION

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3 years ago

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The answer is early sighns of alzheimer dementia

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Irina-Kira [14]

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Read 2 more answers

What role does nitrogen play in the human body

e-lub [12.9K]

Answer:

they make up important parts in your body

Explanation:

they make up proteins that are in your hair, muscles, skin, and important tissues and it defines what you are in your DNA

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4 years ago