Saturday, September 14, 2013

Visit by Appointment sunday pm; Birds and Bees Part 5


There are still some hummingbirds around and the weather tomorrow (sunday) looks good, so I've set up a slot in the afternoon for visits by appointment at 3 pm (ending no later than 4.30). Please email me if you would like to come tomorrow, giving the names and walking ability of those in your party, your car license number and whether you need the required waiver form. Please note you should plan to arrive in the parking lot at 3, from where you will take the woodland path starting at the yellow minibridge. The sanctuary can be difficult to find, so study the Google map (link at right), and give yourself plenty of time. This will probably be the last opportunity this year to visit.

The photo was taken at the sanctuary a week ago by Jimmy Chiu.

In my last post I described why asexual reproduction (practiced by all simple cells, such as bacteria) has a great limitation: to respond to rapidly changing environments, populations must mutate very rapidly, but if the mutation rate is too high, natural selection cannot winnow out the flow of bad mutations, and the population goes extinct. Note that this is NOT because offspring are immediately non-viable; the collapse takes a long time. Now I will try to explain why sex provides the solution to this evolutionary dilemma, and why it has become almost universal for complex life forms, such as us.




1 comment:

  1. Very informative page. Please see:
    Suffolk Country car insurance is a faithful association and be able to be a good quality option the length of with the equivalent field corresponding item Long Island car insurance. They make available all sorts of proposal and assurance along with the Long Island flood insurance. The on top of part of a set also covers and thrash out about Queens NY homeowners insurance.

    ReplyDelete