What are the two divisions of the internal immune system? a. antibiotic immune system b. antiviral immune system c. antibody-mediated immune system d. cell-mediated immune system

Select the correct answer. which term do biologists use to describe the average number of individuals of a species per unit area? a. carrying capacity b. population density c. minimal viable population d. survivability curve

The cluster of developing cells from conception until birth is called an

Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse