Analysis:

1. describe the relationship between the size of the sandpaper and the weathering of the cubes?

2. what type of weathering does the shaking represent?

3. which sandpaper was most effective in breaking down the sugar cubes the fastest and why?

4. what would happen if you shook the jar harder? longer? why?

5. where might you see a similar type of weathering in nature?

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens

Can a trait be both polygenic and have multiple alleles? explain why or why not.