HS-LS4-2

Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive and reproduce in the environment.

More Stories in HS-LS4-2

  1. Animals

    Let’s learn about why turkeys are dinosaurs

    Modern birds are the only dinosaurs that survived an apocalyptic extinction event 66 million years ago.

    By Maria Temming
  2. Fossils

    This bizarre ancient predator snagged soft prey

    Scientists are rethinking how this extinct creature used the spiky limbs sticking out of its face to hunt.

    By Nikk Ogasa
  3. Animals

    Megalodons may have become megahunters by running hot

    O. megalodon sharks were warm-blooded mega-predators. But when food sources dwindled, colder-blooded sharks may have had an evolutionary edge.

    By Carolyn Gramling
  4. Archaeology

    Neandertals were a lot like our human ancestors

    From toolmaking to healthcare, new research finds that Neandertals shared many cultural and social similarities with our human ancestors.

    By Alison Pearce Stevens
  5. Fossils

    Let’s learn about pterosaurs

    These ancient flying reptiles were not dinosaurs, but they were close relatives.

    By Maria Temming
  6. Animals

    Some young fruit flies’ eyeballs literally pop out of their heads

    The first published photo shoot of developing Pelmatops flies shows how their eyes rise on gangly stalks in the first hour of adulthood.

    By Susan Milius
  7. Health & Medicine

    Examining Neandertal and Denisovan DNA wins a 2022 Nobel Prize

    Svante Pääbo figured out how to examine the genetic material from these hominid ‘cousins’ of modern humans.

    By Tina Hesman Saey and Aimee Cunningham
  8. Health & Medicine

    Explainer: What is mpox (formerly monkeypox)?

    Once rare, the viral disease monkeypox exploded onto the global scene for the first time in 2022.

    By Tina Hesman Saey and Janet Raloff
  9. Humans

    Scientists Say: Denisovan

    The Denisovans were a recently discovered population of ancient hominids.

    By Maria Temming
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