Search found 1276 matches

by Darby
Mon Oct 14, 2013 10:34 pm
Forum: Human Biology
Topic: Can Systolic BP ever be less than Diastolic?
Replies: 5
Views: 24558

How would you know? A blood pressure reading is just a reading of high pressure and low - it's assumed the high is systolic...watching the gauge, the high pressure matches the pulse, but that would happen if some weird reverse was true also. One might imagine a condition where osmotic movement incre...
by Darby
Fri Oct 04, 2013 9:56 pm
Forum: Human Biology
Topic: Body termperature
Replies: 4
Views: 2239

Generated heat needs to be dispersed, which is difficult if the environment is close to core temperature.
by Darby
Tue Sep 10, 2013 3:57 pm
Forum: Genetics
Topic: Locus specificity and ERVs - Q from a creationist
Replies: 5
Views: 7708

The issue is whether there's an adaptive function. It seems like the adaptive function is non-expression, which might be affected by location, or might not. If the ERVs are in similar locations, that would imply that they entered the system in a shared ancestor...
by Darby
Tue Sep 10, 2013 3:51 pm
Forum: Evolution
Topic: Gender divison in two opposites is greatest mistake of manki
Replies: 30
Views: 72443

I feel some justification of misogyny at work here. There are some "extra" genes at work, but they are mostly receptors that alter development in a fetus and control reproduction. The "quantity" is true, but fairly pointless.
by Darby
Tue Sep 10, 2013 3:29 pm
Forum: General Discussion
Topic: How much math do you need to know in order to do biology?
Replies: 6
Views: 13691

It's tough to get a degree in biology and not have to do a lot of math. Genetics, chemistry, ecology, physics are fairly math-intensive.
by Darby
Wed Sep 04, 2013 2:02 am
Forum: Evolution
Topic: Gender divison in two opposites is greatest mistake of manki
Replies: 30
Views: 72443

But what's the point here? It shouldn't be a surprise that something as complex as expression of gender features sometimes fall somewhere in between. And it's not just humans - this is not unusual in other organisms. That's why I made the earlier comment - there's nothing particularly new here. It's...
by Darby
Wed Sep 04, 2013 1:50 am
Forum: Zoology Discussion
Topic: Help with Spider Identification
Replies: 3
Views: 3971

Location?
by Darby
Sat Aug 31, 2013 4:03 pm
Forum: Evolution
Topic: Gender divison in two opposites is greatest mistake of manki
Replies: 30
Views: 72443

If your knowledge of genetics ends in about 1926, this MIGHT make sense...
by Darby
Tue Aug 20, 2013 11:19 pm
Forum: Human Biology
Topic: Atavism
Replies: 4
Views: 8521

We all have had tails - they develop in the embryo but are resorbed (not in all cases, the ones that have some appearance at birth), and they are definitely tails. Tails (post-anal) are a shared feature of all mammals, and the embryonic persistence is definite evidence of shared ancestry.
by Darby
Thu Aug 01, 2013 3:16 pm
Forum: Genetics
Topic: un even development of muscle
Replies: 4
Views: 6424

In the skeleton and muscle area, we're supposed to be bilaterally symmetrical. Not everyone is, for a number of possible reasons. You could have picked up some imbalance as an embryo, or you maybe it's how you exercise. Most activities use more than one muscle, and even "identical" exercis...
by Darby
Thu Aug 01, 2013 3:08 pm
Forum: Botany Discussion
Topic: Concept of sexuality in plants.
Replies: 3
Views: 5628

Gender refers to roles in sexual reproduction. The male-female pair (there are a lot of other gender mixes, but I think advanced plants are exclusively m/f) connects to the gametes involved (the parts are secondary to that), with one cell (unless you're a dicot) specialized to accumulate food for th...
by Darby
Thu Aug 01, 2013 2:57 pm
Forum: Zoology Discussion
Topic: A strange worm, please help me determine what it is
Replies: 2
Views: 2847

Looks like some type of hawkmoth caterpillar.