Results 1 to 10 of about 17,853 (204)

Ultrastructure of the lamprey head mesoderm reveals evolution of the vertebrate head

iScience, 2023
Summary: The cranial muscle is a critical component in the vertebrate head for a predatory lifestyle. However, its evolutionary origin and possible segmental nature during embryogenesis have been controversial.
Takayuki Onai, Noritaka Adachi, Hidetoshi Urakubo, Fumiaki Sugahara, Toshihiro Aramaki, Mami Matsumoto, Nobuhiko Ohno   +6 more
doaj   +1 more source

Phototransduction in a marine sponge provides insights into the origin of animal vision

iScience, 2022
Summary: Most organisms respond to light. Here, we investigate the origin of metazoan phototransduction by comparing well-characterized opsin-based photosystems in neural animals with those in the sponge Amphimedon queenslandica.
Eunice Wong, Victor Anggono, Stephen R. Williams, Sandie M. Degnan, Bernard M. Degnan   +4 more
doaj   +1 more source

Sex-specific growth arrest in a lizard

iScience, 2022
Summary: (1) In contrast to mammals and birds, reptiles have been considered as indeterminate growers, whose growth reflects differential allocation of resources to growth versus other energetically demanding processes such as reproduction.
Lukáš Kubička, Adam Tureček, Tomáš Kučera, Lukáš Kratochvíl   +3 more
doaj   +1 more source

Elements of divergence in germline determination in closely related species

iScience, 2023
Summary: Evolutionary transitions are particularly important in development of the germ line, cells which directly impact sexual reproduction. Differences in the primordial germ cells (PGCs) of two sea urchin species were examined here by stage-matched ...
Shumpei Morita, Nathalie Oulhen, Stephany Foster, Gary M. Wessel   +3 more
doaj   +1 more source

Nuclear receptors EcR-A/RXR and HR3 control early embryogenesis in the short-germ hemimetabolous insect Blattella germanica

iScience, 2023
Summary: The role of steroid hormone signaling during insect post-embryonic development has been extensively characterized. However, its function during embryonic development is less understood, particularly in short-germ band hemimetabolous insects.
Josefa Cruz, Oscar Maestro, Xavier Franch-Marro, David Martín   +3 more
doaj   +1 more source

FishPIE: A universal phylogenetically informative exon markers set for ray-finned fishes

iScience, 2022
Summary: Understanding the evolutionary history of the highly diverse ray-finned fishes has been challenging, and the development of more universal primers for phylogenetic analyses may help overcoming these challenges. We developed FishPIE, a nested PCR
Xidong Mu, Yexin Yang, Jinhui Sun, Yi liu, Meng Xu, Changwei Shao, Ka Hou Chu, Wei Li, Chao Liu, Dangen Gu, Miao Fang, Chi Zhang, Fei Liu, Hongmei Song, Xuejie Wang, Jiehu Chen, Ka Yan Ma   +16 more
doaj   +1 more source

Teaching evolutionary biology

Genetics and Molecular Biology, 2004
Evolutionary Biology integrates several disciplines of Biology in a complex and interactive manner, where a deep understanding of the subject demands knowledge in diverse areas.
Rosana Tidon, Richard C. Lewontin
doaj   +1 more source

Comparative analysis of morabine grasshopper genomes reveals highly abundant transposable elements and rapidly proliferating satellite DNA repeats

BMC Biology, 2020
Background Repetitive DNA sequences, including transposable elements (TEs) and tandemly repeated satellite DNA (satDNAs), collectively called the “repeatome”, are found in high proportion in organisms across the Tree of Life.
Octavio M. Palacios-Gimenez, Julia Koelman, Marc Palmada-Flores, Tessa M. Bradford, Karl K. Jones, Steven J. B. Cooper, Takeshi Kawakami, Alexander Suh   +7 more
doaj   +1 more source

Neofunctionalization of ciliary BBS proteins to nuclear roles is likely a frequent innovation across eukaryotes

iScience, 2023
Summary: The eukaryotic BBSome is a transport complex within cilia and assembled by chaperonin-like BBS proteins. Recent work indicates nuclear functions for BBS proteins in mammals, but it is unclear how common these are in extant proteins or when they ...
Alexander Ewerling, Vanessa Maissl, Bill Wickstead, Helen Louise May-Simera   +3 more
doaj   +1 more source

The persistent homology of mitochondrial ATP synthases

iScience, 2023
Summary: Relatively little is known about ATP synthase structure in protists, and the investigated ones exhibit divergent structures distinct from yeast or animals.
Savar D. Sinha, Jeremy G. Wideman
doaj   +1 more source