This leaves the soil open to erosion by water. ... Ploughing up and down slopes causes rainwater to flow down the slope along the furrows, and leads to erosion Overgrazing, where the ability of the grass to regrow the next year is damaged. ...

• Word Count: 462
• Approx Pages: 2
• Has Bibliography
• Grade Level: High School

Mountain gorillas are descendants of ancestral monkeys and apes found in Africa and Arabia during the start of the Oligocene epoch, which was approximately 34-24 million years ago. The fossil record provides evidence of the hominoid primates found in East Africa about 18-22 million years ago. Th...

• Word Count: 909
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School