1. Explain the convection cycle that takes place within Earth’s layers. Describe the source of thermal energy, the direction of energy and matter flow, and the role of gravity in the process. 2. How do convection cycles connect to convergent and divergent tectonic plate systems?

3. Support this claim with evidence and reasoning: Thermal convection within the Earth’s mantle provides a mechanism for the recycling of rock on Earth’s surface.

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as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.