What type of fossil evidence would be most helpful to a scientist trying to determine how much oxygen was in the atmosphere two million years ago?

A) Ice Cores
B) Tree Rings
C) Carbon Films
D) Trace Fossils

Which describes how weathering and erosion are different? weathering is caused by water. erosion is caused by wind and ice. erosion transports sediments. weathering is a natural process.

Which identifies the main purpose of biological taxonomy?

Which of the following is an example of competition a. the leaves of a tree prevent a small shrub from getting sunlight. three species of birds feed a different heights in the same tree. b. three species of birds feed at different heights in the same tree c. zebra and giraffe’s feed on different grassland plants d. cats living in two different homes eat the same brand of cat food.