SPecies are constantly competing for resources
[CER] Agree or disagree? Humans are the most advanced species on Earth and therefore, do not compete or evolve over time. Make a claim. Provide your evidence and justify your reasoning.
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/ Ii / INvestigate
/ Iii / Level Up!
During this lesson you will learn more about how genetic variation among organisms affects survival and reproduction.
✎Notes:
- Same or different members of species often compete for resources, especially for limited natural resources.
- Competition is a basic factor of natural selection. It can lead to the evolution of better adaptations within a species over time.
/ IV / choose your path
/ v / Knowledge Check
Predators and their prey evolve together. Over time, prey animals develop adaptations to help them avoid being eaten and predators develop strategies to make them more effective at catching their prey. These strategies and adaptations can take many forms including camouflage, mimicry, defensive mechanisms, agility, speed, behaviors and even tool usage that make their job easier.
In nature a balance tends to exist between the predators and prey within an environment. When the prey species is numerous, the number of predators will increase because there is more food to feed them and a higher population can be supported with available resources. As the number of predators begins to increase, the density of the prey population will decrease in response to increased rates of predation. That results in a decrease in the number of predators as the food resource becomes smaller which in turn decreases the rate of predation, allowing the prey species population to flourish again. It’s a cycle. One of the best known examples of this cycle occurs with snowshoe hares and Canada lynx. |
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/ VI / redemption pointsRedemption Points
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/ VI / enrichment bonusEnrichment Bonus
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/ VII / Next Level (✓) Checklist:
- Can you use evidence and reasoning to construct an explanation about the cause-and-effect relationship of competition among species.
National Research Council 2012. A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas. Washington, DC: The National Academies Press. https://doi.org/10.17226/13165
This site contains original content that may not be authorized for use by the creator and is legally used under the fair use principles section 107 of the Copyright Act of 1986 (17 U.S. Code § 107)
The official NGSS website. https://www.nextgenscience.org
This site contains original content that may not be authorized for use by the creator and is legally used under the fair use principles section 107 of the Copyright Act of 1986 (17 U.S. Code § 107)
The official NGSS website. https://www.nextgenscience.org