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Related Concept Videos

Complementation Tests00:49

Complementation Tests

A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
Mismatch Repair01:20

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
Effect of Sea Water on Concrete01:22

Effect of Sea Water on Concrete

Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks, which undergo...
Transduction01:16

Transduction

Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome are...
Other Unique Bacteria01:18

Other Unique Bacteria

Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic and are commonly found near the...
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...

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Related Experiment Video

Updated: Jul 8, 2026

Multimodal Optical Microscopy Methods Reveal Polyp Tissue Morphology and Structure in Caribbean Reef Building Corals
10:39

Multimodal Optical Microscopy Methods Reveal Polyp Tissue Morphology and Structure in Caribbean Reef Building Corals

Published on: September 5, 2014

Communication arising. Is coral bleaching really adaptive?

Ove Hoegh-Guldberg1, Ross J Jones, Selina Ward

  • 1Centre for Marine Studies, University of Queensland, Queensland 4072, Australia.

Nature
|February 8, 2002
PubMed
Summary

Coral transplantation experiments suggest bleaching may aid coral survival during environmental shifts. However, the evidence is insufficient to fully support this inference regarding acclimatization to changing light conditions.

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Area of Science:

  • Marine Biology
  • Coral Reef Ecology
  • Environmental Science

Background:

  • Coral bleaching is a significant threat to reef ecosystems globally.
  • Understanding coral acclimatization mechanisms is crucial for conservation efforts.
  • Environmental changes, such as altered light conditions, impact coral health.

Purpose of the Study:

  • To investigate the potential role of coral bleaching in aiding survival during environmental change.
  • To explore mechanisms of coral acclimatization to varying light conditions.
  • To evaluate the evidence supporting Baker's inference on coral bleaching and survival.

Main Methods:

  • Coral transplantation experiment conducted between two different depths.
  • Observation and analysis of coral responses to varying light environments.
  • Assessment of evidence supporting the proposed link between bleaching and survival.

Main Results:

  • Transplantation revealed potential adaptive responses in corals.
  • Baker's experiment hinted at mechanisms for acclimatizing to changing light.
  • The study found insufficient evidence to fully support Baker's inference.

Conclusions:

  • While coral transplantation offers insights, the proposed link between bleaching and enhanced survival requires more robust evidence.
  • Further research is needed to elucidate the complex mechanisms of coral acclimatization.
  • The findings underscore the need for careful interpretation of experimental results in coral reef research.