D 1. What is the biggest problem associated with the introduction of the invasive species, Zebra Mussels, in the Great Lakes? They increase the purity of the lake water, They produce fatter and faster growing salmon. They consume small amounts of algae. They clog up factory intake pipes.​

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When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables