The fossil evidence found in these sedimentary layers best implies that a) land plants are older than land animals. b) vertebrates and invertebrates evolved together. c) invertebrates lived on earth before vertebrates. d) land animals evolved at the same time as marine animals

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

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

Explain how the parts of the peripheral nervous system work with the central nervous system to produce a response to the stimulus