Related Concept Videos
01:46Types of Selection
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
01:43Proofreading
Overview
01:31Proofreading
Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore, it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase Enzyme
Errors During Replication are Corrected by the DNA Polymerase Enzyme
01:20Mate Choice
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
01:39Keystone Species
Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a pivotal role in the...
02:34Competition
When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
You might also read
Related Articles
Articles linked to this work by shared authors, journal, and citation graph.
Sort by
Same author
Peanut Component-Specific IgE and IgG4 Are Modulated by Sublingual Immunotherapy and Are Associated With Remission in 1-4-Year-Old Children.
Allergy·2025
Same author
Baseline basophil activation and early suppression is associated with clinical outcome after peanut sublingual immunotherapy.
The Journal of allergy and clinical immunology·2025
Same author
Efficacy and safety of epicutaneous immunotherapy in children with peanut allergy with atopic comorbidities.
Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology·2025
Same author
To Eat or Not to Eat - Oral Immunotherapy for High-Threshold Peanut Allergy.
NEJM evidence·2025
Same author
Efficacy and Safety of Epicutaneous Immunotherapy in Peanut-Allergic Toddlers: Open-Label Extension to EPITOPE.
The journal of allergy and clinical immunology. In practice·2025
Same journal
Differences in Reported Anaphylaxis Associated With Common Nonsteroidal Anti-inflammatory Drugs: A Pharmacovigilance Study.
International archives of allergy and immunology·2026
Same journal
Association of Serum Galectin-3 Binding Protein with Acute Exacerbation, Inflammation, and Airway Remodeling in Pediatric Asthma.
International archives of allergy and immunology·2026
Same journal
Effectiveness of a Provincial Law to Improve Epinephrine Use for Anaphylaxis in Schools in Alberta, Canada: A Pre-Post Study.
International archives of allergy and immunology·2026
Same journal
Rab27 a regulates dendritic cell immune tolerogenic capacity.
International archives of allergy and immunology·2026
Same journal
Burden of Hereditary Angioedema in Adults: Impact of Disease and Patient Characteristics.
International archives of allergy and immunology·2026
Same journal
Predictors of Treatment Response to Omalizumab in Children with Chronic Spontaneous Urticaria: A Real World Study.
International archives of allergy and immunology·2026
Related Experiment Video
Updated: May 10, 2026
07:26
BioMEMS: Forging New Collaborations Between Biologists and Engineers
Published on: November 1, 2007
Associate editor A. Wesley Burks
International Archives of Allergy and Immunology
|July 3, 2013
Summary
No abstract available in PubMed .
