Explain the features that would have enabled Homo ergaster to have migrated out of Africa.

What will be an ideal response?


Answers may vary: Homo ergaster had a larger brain, rounder jaw, prominent brow ridges and a projecting nose.  The nose was adapted for a hot, dry climate.  Male Homo ergaster were approximately 1.8 meters tall and females were 1.55 meters tall.  They stood erect and had a striding gait of modern humans.  It is believed they migrated into Europe and Asia between 2 MYA and 1 MYA.  They had a knowledge of fire and may have been the first to cook their food.

Biology & Microbiology

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Which of the following statements about nuclear localization of proteins is not true?

A. Importin ? and importin ? form a cytosolic complex that interacts with proteins containinga nuclear localization signal. B. Ran-GTP binding is required for the recycling of both importin ? and importin ? back to the cytosol. C. Ran-GDP is transported from the nucleus to the cytosol.

Biology & Microbiology

Repeating the sequence of the polymerase chain reaction doubles the number of DNA fragments each time

a. True b. False Indicate whether the statement is true or false

Biology & Microbiology

Which of the following is a common ailment characterized by a burning sensation caused by gastric juices backing up into the esophagus?

A) heartburn B) acidosis C) porosis D) gastritic stress

Biology & Microbiology

Which is true concerning quiet/REM sleep?

What will be an ideal response?

Biology & Microbiology