The case against evolution

The case against evolution

The case against evolutionAs a result of recent investigations on the sex chromosomes and chromosome numbers in...
Dhs. 25.19 AED
Dhs. 50.41 AED
Dhs. 25.19 AED
SKU: gb-68574-ebook
Product Type: Books
Please hurry! Only 10000 left in stock
Author: O'Toole, George Barry,1886-1944
Format: eBook
Language: English
Subtotal: Dhs. 25.19
10 customers are viewing this product
The case against evolution

The case against evolution

Dhs. 50.41 Dhs. 25.19

The case against evolution

Dhs. 50.41 Dhs. 25.19
Author: O'Toole, George Barry,1886-1944
Format: eBook
Language: English

The case against evolution

As a result of recent investigations on the sex chromosomes and chromosome numbers in mammals, Theophilus S. Painter reaches the conclusions that polyploidy cannot be invoked to explain evolution within this class. After giving a table of chromosome numbers for 7 out of the 9 eutherian orders, Painter concludes: The facts recorded above are of especial interest in that they indicate a unity of chromosome composition above the marsupial level and effectively dispose of the suggestion that extensive polyploidy may have occurred within this subclass. In the marsupials the chromosome number is a low one and in the opossum is 22. At first sight it might appear that the eutherian condition might have arisen from this by tetraploidy. There are two objections, however. In the first place the bulk of the chromatin in marsupials is about the same as in the eutheria, using the sex chromosome as our measure. In the second place, polyploidy could scarcely occur successfully in animals with X-Y sex chromosomes, as most mammals possess, because of the complication occurring in the sex chromosome balance (Science, April 17, 1925, p. 424). As the X-Y type of sex chromosomes occurs widely not only among vertebrates, but also among insects, nematodes, and echinoderms, Painters latter objection excludes evolution by polyploidy from a large portion of the animal kingdom. ......Buy Now (To Read More)

Product details

Ebook Number: 68574
Author: O'Toole, George Barry
Release Date: Jul 21, 2022
Format: eBook
Language: English
Publisher: The Macmillan Company
Publication Date: 1925
Publisher Country: United States

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