The imaginary circle drawn around Earth 23 to the south of the North Pole is called the _____________.
Fill in the blank(s) with correct word
Question 2
Earth's terrestrial ecosystems can be categorized into one of four basic types: ____.
a. forest, grassland, desert, and highlands
b. forest, grassland, desert, and tundra
c. forest, shrub, grassland, and tundra
d. rain forest, coniferous forest, grassland, and desert
e. rain forest, shrub, grassland, and desert