49) a research team began a study of a cultured cell line. their preliminary observations showed them that the cell line did not exhibit either density-dependent inhibition or anchorage dependence. what could they conclude right away? ; a) the cells originated in the nervous system.; b) the cells are unable to form spindle microtubules.; c) they have altered series of cell cycle phases.; d) the cells show characteristics of tumors.; e) they were originally derived from an elderly organism.

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