Most canyons were formed by a process of long-time erosion from a plateau or table-land level. The cliffs form because harder rock strata that are resistant to erosion and weathering remain exposed on the valley walls
Answer:
The Paramecium reproduce asexually. You can tell because there is only one needed to reproduce.
<u>Answer</u>: c) bottleneck effect
<u>Explanation</u>: The significant reduction in genetic variation due to a major decrease in population's size for at least one generation is called a bottleneck effect. Although the population can recover, the low genetic variation will still pose a significant risk for the long term survival of the species.
