In 2004, Scientists Announced the Discovery of the Fossil Remains

question 51

Multiple Choice

In 2004, scientists announced the discovery of the fossil remains of some extremely short early humans on the Indonesian island of Flores. The new species has been named Homo floresiensis. One hypothesis is that H. floresiensis evolved from Homo erectus, another early human species. How did a population of H. erectus become isolated on this remote island? Early humans constructed boats and rafts, so perhaps they were blown far off course by strong winds during a storm. H. erectus averaged almost 6 feet in height, but the remains show that adults of H. floresiensis were only about 3 feet tall. It is hypothesized that limited resources on this hot and humid island (only 31 square miles) exerted selection pressure, and succeeding generations began to shrink in size. Small bodies require less food, use less energy, and are easier to cool than larger bodies. Evolution of small size in similar circumstances has been observed in many other species but never before in humans. This find demonstrates that evolutionary forces operate on humans in the same way as on all other organisms.
-The evolution of H. floresiensis is an example of

• A) sympatric speciation.
• B) allopatric speciation.
• C) adaptive radiation.
• D) hybridization.

Understand the concept of multiple conclusions from a single premise.

Differentiate between arguments that can and cannot be diagrammed.

Assess the significance of symbols used in argument diagrams.

Understand the benefits of breast-feeding for both mother and child.

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Definitions:

Pedal Pulse

The palpable beat of the artery at the top of the foot, used to assess blood circulation to the lower limb.

Surgical Procedure

A medical operation intended to diagnose or treat a condition through manual or instrumental techniques.

IV Fluids

Solutions administered directly into the bloodstream via an intravenous route to maintain fluid balance, administer medication, or correct electrolyte imbalances.

Axillary Temperature

Axillary temperature is a way to measure body temperature by placing a thermometer in the armpit.