The endosymbiotic theory proposes that mitochondria in eukaryotic cells arose from . a. endosymbiotic eukaryotes that metabolized oxygen. b. endosymbiotic eukaryotes that were photosynthetic. c. endosymbiotic prokaryotes that metabolized oxygen. d. endosymbiotic prokaryotes that were photosynthetic .

"acknowledging a right to benefit from the presence of animals requires government action to ensure human access to animals in a number of different spheres," writes jessica pierce, ph.d., in psychology today. the pragmatic meaning of the term "right" in this statement is

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

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