A student wants to ensure cross-pollination occurs between two different plants. Which procedure should the student use to ensure that cross-pollination can occur? •Pluck all of the flower petals from one of the given plants.
•Cover the flowers of one of the plants with a small plastic bag.
•Remove the pistils from the flowers of one of the plants before it matures.
•Remove the anthers from the flowers of one of the plants before it matures.

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