The cell membrane is to the cell as A) the ocean is to the Earth
B) the atmosphere is to the Earth
C) a house is to the Earth
D a forest to the Earth

What is the average speed of a car that traveled 300.0 miles in 5.5 hours

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

The dense layer of connective tissue that surrounds an entire skeletal muscle is the