Why are plants classified as producers? why are plants classified as producers? plants are classified as producers because they are at the bottom of the food chain. plants are classified as producers because they produce oxygen. plants are classified as producers because they fix inorganic carbon into organic molecules?

Apart of an ecosystem that can restrict the growth of a population is referred to as

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

Why do mountaineers become breathless as they reach high altitudes