Exam 18: The History of Life

Flowering plants first rose to prominence in the

Prior to continental drift, North America and Eurasia formed a supercontinent called__________.

Some RNA molecules have been discovered that can

Pollen likely evolved in response to plants moving to drier land.

An adaptation that is closely associated with hominin evolution is

Which characteristic sets hominins apart from other primates?

To be classified as a eukaryote, an organism must have

The first terrestrial animals were probably

__________may have evolved from photosynthetic cyanobacteria that were engulfed by predatory prokaryotic cells.

Cell size is limited by the ability of oxygen, nutrients, and wastes to diffuse through the cell membrane.

Why is RNA considered by many scientists to have been the basis for early forms of life?

What compounds were used in Miller and Ureyʹs experiment to simulate the atmosphere of early Earth?

Mitochondria contain their own DNA, separate from that of the rest of the cell.

The fossil evidence indicates that amphibians evolved from __________.

The earliest group of land animals was the

Exoskeletons provided an evolutionary advantage to organisms by

Which of the following species do paleoanthropologists believe may be the most direct ancestor to Homo sapiens?

Arthropods were the first terrestrial animals because their exoskeletons allowed them to withstand

The generally slow and steady succession of species on Earth has been interrupted by

Eggs and scales are features that enabled reptiles to dominate land during the Permian period.