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How deep is the root system of a giant sequoia?

4 meters (13 feet)
20 meters (60 feet)
40 meters (130 feet)
80 meters (260 feet)
The sequoias root system is wide spreading, but shallow. There is no taproot. A mature sequoia's roots can occupy over 1 acre of earth and contain over 90,000 cubic feet of soil.
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Answers by country

4 meters (13 feet)
20 meters (60 feet)
40 meters (130 feet)
80 meters (260 feet)
answers
flagPakistan
40%
10%
30%
20%
20
flagthe United States
28%
10%
32%
27%
183
flagUnknown
28%
17%
25%
28%
28
flagIndia
26%
16%
29%
26%
149
flagthe Philippines
26%
6%
33%
33%
15
flagAustralia
25%
25%
33%
16%
12
flagthe United Kingdom
23%
23%
28%
23%
38
flagUkraine
22%
22%
27%
27%
18
flagPoland
21%
18%
29%
30%
6524
flagCanada
18%
9%
36%
36%
11

How do baby birds get oxygen inside their eggs?

They have a large oxygen supply from the start
Oxygen is created during protein reduction
Oxygen comes in through pores in the shell
They don't need oxygen at all

What is inside Swiss cheese holes?

nitrogen
carbon dioxide
water vapor
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coke from coal
saltpeter
digestive enzyme
heroin

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a cracking noise
a fizz
a roar
a whisper