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.
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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.
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
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
Which is true concerning quiet/REM sleep?
What will be an ideal response?