このページは機械翻訳されています。他のページは英語で表示される場合があります。View in English
エディアカランのマクロオーガニズムの生殖モードの再構築
Emily G Mitchell1, Charlotte G Kenchington1,2, Alexander G Liu3
1Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK.
Nature
|August 4, 2015
PubMed で要約を見る
まとめ
この研究は,古代のエディアカンの生物であるFractofususが,ストロンと水中プロパグルを介して無性繁殖していたことを明らかにしています. この複雑な生命の歴史は,迅速な地元の植民地化と新しい環境への分散の両方を可能にしました.
科学分野:
- 古生物学
- 発達生物学
- エコロジー
背景:
- 後期エディアカンのマクロ化石は,最も初期の複雑な生物を代表し,微生物の生態系とカンブリア爆発を橋渡ししている.
- ランジオモルフは,静止性 benthic 習慣を持つ謎めいた,モジュラー,自己類似の分岐生物です.
- 場所の化石集団は,空間分析を用いてその生物学を研究する機会を提供します.
研究 の 目的:
- ランゲモルフの生殖戦略と生殖経歴を調査する
- フラクトフューサス繁殖の生態学的意味を理解する
- 複雑な生命の初期における 発達生物学的な洗練を記録する
主な方法:
- 局所化石化したレンジモルフ集団に適用される空間点処理技術.
- Fractofusus化石における再発的なクラスタリングパターンの分析.
- 化石の証拠に基づいた 生命の歴史の再構築
主要な成果:
- Fractofususで再発するクラスタリングパターンの特定
- 多世代性 ストロンのような無性繁殖の証拠
- 水媒介のプロパグルの拡散を発見した.
関連する概念動画
02:56The Fossil Record
28.5K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
28.5K
02:35What is Evolutionary History?
44.8K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
44.8K
01:08Evolution of Microbial Genome
50
Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
50
02:40The Tree of Life - Bacteria, Archaea, Eukaryotes
41.9K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
41.9K
02:38Asexual Reproduction
38.3K
Asexual reproduction allows plants to reproduce without growing flowers, attracting pollinators, or dispersing seeds. Offspring are genetically identical to the parent and produced without the fusion of male and female gametes.
38.3K
01:27Diversity of Protists III
2.0K
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
2.0K