What structure is missing in the fungal hyphae shown on the right side of Figure 21-5? A. cell walls
B. cross walls
C. nuclei
D. cytoplasm

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior

9. the history of life on earth is recorded in