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Related Concept Videos

Types of Selection01:46

Types of Selection

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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...
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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.
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An outlier is an observation of data that does not fit the rest of the data. It is sometimes called an extreme value. When you graph an outlier, it will appear not to fit the pattern of the graph. Some outliers are due to mistakes (for example, writing down 50 instead of 500), while others may indicate that something unusual is happening. Outliers are present far from the least squares line in the vertical direction. They have large "errors," where the "error" or residual is the...
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Data are individual items of information obtained from a population or sample. Data may be classified as qualitative (categorical), quantitative continuous, or quantitative discrete. Because it is not practical to measure the entire population in a study, researchers use samples to represent the population. A random sample is a representative group from the population chosen by using a method that gives each individual in the population an equal chance of being included in the sample. Random...
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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.
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How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
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Editor-in-Chief's Top Picks From 2023.

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    Journal of the American College of Cardiology
    |March 6, 2024
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    Summary

    This JACC issue highlights 100 top cardiovascular research papers from diverse specialties, including original investigations and global disease burden studies. These selections represent influential work, offering insights into cardiovascular health and disease management.

    Area of Science:

    • Cardiovascular Medicine
    • Clinical Cardiology
    • Translational Science

    Background:

    • The Journal of the American College of Cardiology (JACC) publishes significant research across various cardiovascular specialties.
    • Identifying and disseminating the most impactful research is crucial for advancing cardiovascular medicine.

    Purpose of the Study:

    • To curate and present a comprehensive overview of the year's most significant cardiovascular research published in JACC.
    • To provide accessible summaries, central illustrations, and podcasts of top-tier studies for a broad audience.

    Main Methods:

    • Selection of the top 100 papers based on editorial board choices, personal review, and high access/download rates.
    • Inclusion of Original Investigations, Review Articles, Society Documents, and Global Burden of Diseases studies.

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  • Categorization of research into distinct sections for clarity, including Aorta, Cardiac Failure, and Valvular Heart Disease.

    • Main Results:

    • A curated collection of 100 influential cardiovascular research papers is presented.
    • Research spans multiple specialties, including basic science, clinical interventions, and public health.
    • Accompanying materials like abstracts, central illustrations, and podcasts enhance accessibility.

    Conclusions:

    • This compilation offers a valuable resource for understanding key advancements in cardiovascular medicine.
    • The selected papers represent the breadth and depth of important research shaping the field.
    • Accessible formats ensure wide dissemination of critical findings to clinicians and researchers.