Avaccine can protect you against a disease because it a. destroy toxic substances from bacteria before they can make u sick b. stimulated your immune system against the pathogen c. kills any pathogenic bacteria in your body d. changes pathogenic into harmless bacteria

Which of the following birds remained ancient looking in the miocene epoch? a. crows b. owls c. grouses d. none of the above

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

The term facultative anaerobe refers to an organism that