Of which era was the cretaceous period?

Changes in the environment can alter the dynamics of natural selection in predator-prey relationships. As the planet continues to warm, climate change will have a significant effect on many of these relationships.

Which of the following is a biotic factor? a. Parasites b. Sun c. Soil d. Temperature

Within ecosystems, energy generally flows from A. secondary consumers to primary consumers. B. primary consumers to producers. C. primary consumers to secondary consumers. D. all of these

does vasoconstriction increase or decrease the supply of blood to the tissues beyond the vasoconstricted area?

What are non examples of biome?

Describe the details you're able to see When viewing specimens with a scanning electron microscope in the microscope activity

The large lymphatic organ that filters blood and destroys bacteria is the

Many enzymes require metal ions as cofactors due to the inherent properties of the metal ion. Metal ions, when bound to water, will favor the formation of hydroxide ion, which is a strong nucleophile.

What is a vestigial structure? A. A structure that has no use in the organism B. A structure with similar shape but a different use C. A structure that is only in index fossils D. A structure that contains isotopes! apex!

Why is forecasting human population growth more difficult than forecasting population growth in other animals?