An overview of the basic process of natural selection is provided, the extent and possible causes of misunderstandings of the process are discussed, and a review of the most common misconceptions that must be corrected before a functional understanding ofnatural selection and adaptive evolution can be achieved.
The completely sequenced and annotated spider mite genome is presented, representing the first complete chelicerate genome, and finds strong signatures of polyphagy and detoxification in gene families associated with feeding on different hosts and in new gene families acquired by lateral gene transfer.
Three independent databases of eukaryotic genome size information have been launched or re-released in updated form since 2005: the Plant DNA C-values Database (), the Animal Genome Size Database ()…
Biological reviews of the Cambridge Philosophical…
1 February 2001
TLDR
A detailed review of the debate surrounding the C‐value enigma, the various theories proposed to explain it, and the evidence in favour of a causal connection between DNA content and cell size is provided.
A basic introduction to evolutionary trees is provided, including some guidelines for how and how not to read them, and 10 of the most common misconceptions about evolutionary trees and their implications for understanding evolution are addressed.
Despite the potential benefits of DNA barcoding to both the practitioners and users of taxonomy, it has been controversial in some scientific circles and a few have even characterized it as being “anti-taxonomy,” arguing that its implementation will signal the death of a system 250 years in the making.
Until recently the study of individual DNA sequences and of total DNA content (the C-value) sat at opposite ends of the spectrum in genome biology, but the dawn of comprehensive genome sequencing has allowed a new synergy between these fields, with sequence data providing novel insights into genome- size evolution, and with genome-size data being of both practical and theoretical significance for large-scale sequence analysis.
The fundamental questions of the C-value enigma clearly transcend taxonomic boundaries, and increased communication is therefore urged among those who study genome size evolution, whether in plants, animals or other organisms.
The results suggest that the structure of the feeding hierarchy may not be determined solely by competitive ability but may also be greatly influenced by differences in the feeding behaviour of unstressed fish versus stressed fish caused by cortisol elevation in the latter.