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The Evidence for Evolution

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.

What is Biodiversity?

What is Biodiversity?

Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.

Evolutionary Relationships through Genome Comparisons

Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...

Biodiversity and Human Values

Biodiversity and Human Values

Human civilization relies on biodiversity in many ways. Sudden changes in species biodiversity result in environmental changes that can modify weather patterns and therefore human civilizations.

What is Evolutionary History?

What is Evolutionary History?

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.

Diversity of Protists II

Diversity of Protists II

Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...

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Related Experiment Video

Updated: Nov 8, 2025

Resurrection of Dormant Daphnia magna: Protocol and Applications

Resurrection of Dormant Daphnia magna: Protocol and Applications

Published on: January 19, 2018

Biodiversity-based development and evolution: the emerging research systems in model and non-model organisms.

Long Zhao^1,2, Feng Gao^1,3,2, Shan Gao^1,3,4

¹Institute of Evolution and Marine Biodiversity (IEMB), Ocean University of China, Qingdao, 266003, China.

Science China. Life Sciences

|April 24, 2021

Summary

Evolutionary developmental biology (Evo-Devo) investigates how developmental changes drive evolution. This review highlights new research using diverse organisms to explore fundamental biological processes and adaptation.

Keywords:

Evo-Devo biodiversity environmental adaptation epigenetic mutation regeneration

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Area of Science:

Evolutionary developmental biology (Evo-Devo)
Integrative biology

Background:

Evo-Devo studies how developmental changes influence organismal evolution and innovation.
Model organisms have provided significant insights, but limitations exist for understanding broader biodiversity and adaptation.
Advancements in genomics and gene-editing enable studies on non-model organisms.

Purpose of the Study:

To review recent advancements in Evo-Devo research.
To explore regulatory signaling in development and regeneration.
To examine environmental adaptation and evolutionary mechanisms across diverse species.

Main Methods:

Integration of principles and methods from multiple biological subdisciplines.
Comparative studies using established model organisms (zebrafish, Drosophila).
Exploration of emerging non-model organisms (amphioxus, ascidian, ciliates, phytoplankton, marine nematode).

Main Results:

Recent work focuses on regulatory signaling in development and regeneration.
Studies investigate adaptation to environmental factors.
Evolutionary mechanisms are explored in both model and non-model systems.

Conclusions:

Expanding studies to non-model organisms is crucial for understanding life's processes and adaptation.
New directions and challenges in Evo-Devo research are identified.
Integrating diverse systems deepens our understanding of evolution and development.