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Aug
19
comment Why do sneezes come out the mouth?
Your premise is wrong: si.wsj.net/public/resources/images/…
Aug
17
reviewed Approve What is the percentage of people living in England in 1500 AD whose lineage is still alive?
Aug
10
answered What is the basis for the determining sex from position of adult pelvis?
Aug
9
comment Is it “easier” for researchers to detect evolutionary ancestry than distance in the evolutionary tree?
In short, extant species are not ancestors of one another because, even if they are sister taxa, each has its own separate evolutionary history since they diverged. So, no to question 1.
Aug
7
awarded  Enlightened
Aug
7
awarded  Nice Answer
Jul
30
revised Driving force for speciation for millions of species today
Fixing some grammar
Jul
28
reviewed Leave Closed Why are nitrogenous bases of DNA hydrophobic if they can hydrogen bond?
Jul
23
comment What form of reproduction did the first land animals use?
Are you thinking of vertebrates or non-vertebrates?
Jul
23
comment Human Bones classification and anatomy quiz
@AliceD I disagree. Here's a question with a valid attempt at answer, seeking clarification. Seems like a reasonable homework question. Maybe not the more interesting, but valid and worthy of answering.
Jul
22
comment Human Bones classification and anatomy quiz
If you are voting down, please leave a comment.
Jul
22
comment Human Bones classification and anatomy quiz
As you not in your question, I think there are some difficulties in translation. I suspect that "plane" should be translated as "flat", that "mixed" is likely "irregular", and "odd" and "even" are "paired" and "unpaired". Does that sound right?
Jul
21
reviewed Approve How do we know the human species arose in Africa?
Jul
21
answered Blomberg's K and branch length
Jul
21
comment Why do low temperatures kill
See tardigrade: popularmechanics.com/space/a11137/…
Jul
20
comment What chordata evolve first limb
As fileunderwater suggests, you can and should update your question with the additional information from these comments.
Jul
20
comment What chordata evolve first limb
Limbs with bone in them and fins with fin rays (lepidotrichia) in them are different. Which one are you interested in?
Jul
18
reviewed Leave Open Phosphorylation capacity of an enzyme
Jul
18
reviewed Close Why is it so hard to find the amount of biotin in food?
Jul
16
revised Is the discovery of dominant and recessive genes the only reason Mendel matters?
Fix formatting