Biology
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644 Answers

Votes Activity Newest
231
Why are so few foods blue?
Feb 20 '17 at 10:02
120
Are male and female brains physically different from birth?
Nov 27 '17 at 12:50
81
Are there organisms with fewer than 1000 neurons?
Mar 24 '17 at 8:58
78
Is there an RGB equivalent for smells?
Jan 16 '17 at 13:57
70
Can the dead be brought back to life by viruses?
Jan 28 '16 at 12:46
70
What is the evolutionary advantage of red-green color blindness?
Mar 10 '16 at 11:59
60
Can brain cells move?
Dec 15 '14 at 11:29
57
Why can't we kill ourselves by holding our breath?
Jun 4 '18 at 10:11
56
What is the benefit of fever during infections?
Apr 3 '17 at 9:03
54
Are there any non-mammalian species known that lactate?
Oct 5 '15 at 11:12
53
Why is the brain white?
Aug 17 '15 at 0:04
51
Why do smaller mammals move intermittently?
May 29 '15 at 11:04
49
Does animal blood, esp. human, really have similar salinity as ocean water, and does that prove anything about evolution?
Oct 17 '19 at 12:08
49
How long can an octopus survive out of the water?
Feb 18 '16 at 8:40
46
Can humans perceive sounds above 20 kHz?
Jan 21 '15 at 12:23
43
Are drugs made bitter artificially to prevent being mistaken for candy?
Dec 17 '20 at 13:51
40
Why do human females have periods?
Mar 30 '17 at 19:27
40
Why is it advised that infants are fed mother's milk?
Mar 12 '16 at 20:15
39
Are trees the only source of large amounts of oxygen?
Jun 13 '15 at 14:35
35
Why does my room suddenly look 'reddish'? My eyes seem to adapt to color
Mar 18 '18 at 19:39
35
Why does an electrical shock freeze up muscles?
May 26 '15 at 11:07
34
What are the advantages of forgetting?
Mar 9 '17 at 11:16
33
Can one see flickering of a light bulb at 50 Hz?
Aug 19 '18 at 18:36
32
What's the smallest size a human eye can see?
Dec 27 '14 at 12:45
31
Why do adults lose hearing at high frequencies?
Jan 19 '15 at 4:53
29
Are humans more adapted to “light mode” or “dark mode”?
Jan 4 at 13:27
29
Can plants suffer from CO2 poisoning?
Mar 13 '18 at 10:17
29
How did the felines get to America?
Mar 27 '17 at 12:56
28
Why is the Krebs cycle considered a part of aerobic metabolism if molecular oxygen is not involved in any of the reactions in the cycle
Oct 30 '14 at 4:02
28
Can we taste electrons?
Feb 25 '16 at 20:55
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