The latitude of a particular ecosystem determines the climate zone of the ecosystem. What type of seasonal variation occurs in ecosystems in temperate zones, which are latitudes between 23.5° and 66.5°? Temperate zones experience warm, pleasant weather all year long because the amount of sun they receive is relatively constant all year.

Temperate zones experience extremely hot summers and brief, mild winters because this zone receives direct sun all year.

Temperate zones experience hot summers and cold winters because the sun is lower in the sky in the winter compared to summer.

Temperate zones experience short, mild summers and extremely cold winters because this zone receives less direct sun all year.

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals