Due to its unusual habitat (inside the digestive tracts of other animals), the tapeworm lacks _____
A) a reproductive system
B) a mouth
C) a digestive tract
D) a mouth and a digestive tract
E) a reproductive and digestive system
Answer: D
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Authentication technique that rely on personal biological traits are called
A) Interoperability B) Intangibles C) Return on investment D) Biometrics
A beekeeper opens one of his hives. At first, only one bee gets under his suit and stings him. He is then swarmed by the rest of his bees, and ends up with several stings. Why did most of the hive attack him? Select all correct choices
A. Because the first bee produced alarm pheromones. B. Because the first bee produced trail pheromones. C. Because the first bee produced amine hormones. D. Because the first bee produced steroid hormones. E. Because the first bee produced paracrine signals.
Ischemia in the heart often leads to angina pectoris, which is ____
Fill in the blank(s) with the appropriate word(s).
Which ancestors of modern humans migrated out of Africa to populate the rest of the world?
a. Homo habilis b. Homo erectus c. Neanderthals d. Cro-Magnon e. Homo sapiens