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Nov
22
revised What is possibly wrong in my gel electrophoresis when I didn't see bands of DNA ladder on gel?
added 612 characters in body
Nov
22
awarded  Enlightened
Nov
22
awarded  Nice Answer
Nov
20
reviewed Approve Why are there no tree-like plants that grow in lakes?
Nov
19
comment What are some difficulties animals had to overcome to reproduce on land?
Are you thinking of vertebrates specifically? Or animals more generally (including insects, mollusks, etc.)?
Nov
16
comment How to determine externally that a whale is a mammal?
@JeremyKemball Only milk and hairs make them mammals. Warm-blooded and live birth are present outside of mammals.
Nov
16
comment What proportion of salt in water would make it not dehydrate nor hydrate someone?
You are looking for physiological saline which is isotonic to most tissues. It is about 0.9% w/v, which equates to ~9g NaCl per liter water.
Nov
16
comment Why do mammalian red blood cells lack a nucleus?
The relationship between carrying more oxygen per cell and surface area does not follow logically to me. Enucleation will lead to increased surface area per unit volume, which will relatively increase the area for transport across the membrane. But aside from increasing Hb content or concentration, that won't lead to more oxygen carrying capacity.
Nov
11
revised human immune system
Add information from comment posted as answer.
Nov
8
reviewed No Action Needed Can cracking fingers cause Arthritis?
Nov
8
reviewed Approve Question about what the liver does NOT do
Nov
8
comment A subtle test for color-blindness
This question appears to be off-topic because it has been posted to CogSci.
Nov
6
comment Insects or Birds covering least distance but most wing moves
When hummingbirds are hovering, they go 0 distance at ~80 Hz flapping frequency and ~1200 bpm heartrate. hummingbirds.net/about.html#wingbeat
Oct
31
comment How can we calculate the minimum sustainable number of the panda population?
Relevant question: biology.stackexchange.com/questions/305/…
Oct
31
comment When writing about past research should I use the species name they employed or the modern version?
I've also seen cases like this written as "Campylobacter [Vibrio] fetus". Or just use the revised genus and ignore the old name.
Oct
25
answered How did aquatic dinosaurs go extinct?
Oct
25
revised How did aquatic dinosaurs go extinct?
Fixing grammar, Retag
Oct
24
reviewed Approve What kind of technology is required for plant seed DNA printing?
Oct
22
reviewed Approve Can “human exclusion zones” in national parks for preserving Wolves and Grizzlies be a good idea?
Oct
20
comment Is there a maximum size for an insect?
Also relevant are biology.stackexchange.com/q/13444/107 and biology.stackexchange.com/a/20677/107