On Germinal Selection as a Source of Definite Variation

On Germinal Selection as a Source of Definite VariationThe present paper was read in the first general...
€6,17 EUR
€6,17 EUR
SKU: gb-34077-ebook
Product Type: Books
Please hurry! Only 10000 left in stock
Author: Weismann, August,1834-1914
Format: eBook
Language: English
Subtotal: €6,17
10 customers are viewing this product
On Germinal Selection as a Source of Definite Variation

On Germinal Selection as a Source of Definite Variation

€6,17

On Germinal Selection as a Source of Definite Variation

€6,17
Author: Weismann, August,1834-1914
Format: eBook
Language: English

On Germinal Selection as a Source of Definite Variation

The present paper was read in the first general meeting of the International Congress of Zologists at Leyden on September 16, 1895. Several points, which for reasons of brevity were omitted when the paper was read, have been re-embodied in the text, and an Appendix has been added where a number of topics receive fuller treatment than could well be accorded to them in a lecture. The address was first printed in The Monist for January, 1896, and afterwards in a German pamphlet. The basal idea of the essaythe existence of Germinal Selectionwas propounded by me some time since,[1] but it is here for the first time fully set forth and tentatively shown to be the necessary complement of the process of selection. Knowing this factor, we remove, it seems to me, the patent contradiction of the assumption that the general fitness of organisms, or the adaptations necessary to their existence, are produced by accidental variationsa contradiction which formed a serious stumbling-block to the theory of selection. Though still assuming that the primary variations are "accidental," I yet hope to have demonstrated that an interior mechanism exists which compels them to go on increasing in a definite direction, the moment selection intervenes. Definitely directed {4}variation exists, but not predestined variation, running on independently of the life-conditions of the organism, as Naegeli, to mention the most extreme advocate of this doctrine, has assumed; on the contrary, the variation is such as is elicited and controlled by those conditions themselves, though indirectly. ......Buy Now (To Read More)

Product details

Ebook Number: 34077
Author: Weismann, August
Release Date: Oct 15, 2010
Format: eBook
Language: English

Contributors



Translator: McCormack, Thomas J. (Thomas Joseph), 1865-1932

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Related Products

Recently Viewed Products