STAAR Review DAY 10 ORGANISMS AND ENVIRONMENTS TEKS 8.11C (R), 7.11A (S), 7.12B (S), 7.12D (S), 7.12F (S), 7.14B (S), 7.14C (S), 6.12D (S) © Hedgehog Learning

Traits and Environmental Changes Why did the environmental changes in the early 1900’s in England cause the “gray” peppered moth to decline, but the “black” peppered moth increased in population? © Hedgehog Learning

Traits and Environmental Changes Genetic trait for skin tone and skin cancer risk People with a genetic trait for fair skin are more likely to get skin cancer during their lifetime. Fairer-skin humans generally originated further away from the equator than darker-skin humans. Explain how the environment influenced early human traits for skin tone. © Hedgehog Learning

Dichotomous Keys © Hedgehog Learning Dichotomous keys help us to identify organisms based on their physical characteristics. What is the dichotomous key in the picture used to identify?

Body Systems © Hedgehog Learning

Reproduction Sexual Reproduction Requires male and female © Hedgehog Learning Sexual Reproduction Requires male and female Fewer offspring Greater genetic variation Asexual Reproduction Requires only one parent Many offspring Less genetic variation What are the advantages of sexual reproduction in fighting off certain illnesses over multiple generations? Some plants can reproduce asexually. Animals reproduce sexually and produce fewer offspring.

Parts of a Cell Parts of a Cell Looking at the diagram on the right: Where is the genetic material contained? Is this cell prokaryotic or eukaryotic? Is this cell autotrophic or heterotrophic? Would this cell be found in the animal kingdom? Parts of a Cell Nucleus Eukaryotic Autotrophic No © Hedgehog Learning

Human Interaction with the Oceans Building artificial reefs to replace those damaged by humans Many coral reefs have been damaged or destroyed by human activity and pollution. In an effort to restore destroyed reefs, scientists have created artificial reefs like the one in the picture. What other ways have humans influenced the ocean habitat? © Hedgehog Learning

Would not help avoid predators Would not help in summertime © Hedgehog Learning

They would not have as good of a chance at survival. © Hedgehog Learning

© Hedgehog Learning

They would not find food Many would starve The change would happen slowly © Hedgehog Learning

Oval = elongated © Hedgehog Learning

© Hedgehog Learning

© Hedgehog Learning

YOU are Eukaryotic (your cells contain a nucleus) © Hedgehog Learning

The nucleus contains DNA © Hedgehog Learning

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© Hedgehog Learning

G E M O N H R T S F C K I L B J A Q D P © Hedgehog Learning