Which embryonic membrane forms the commonly of the placenta?

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#Question id: 3431

#11. Evolution and Behavior

In the territorial behavior of the stickleback fish, the red belly of one male elicits attack from another male by functioning as

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#Question id: 116

#1. Molecules and their Interaction Relevant to Biology

A compound containing N-acetylneuraminic acid (sialic acid) is:

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#Question id: 24166

#Aptitude

The term spices is a pleasant one, whether it connotes fine French cuisine or a down-home, cinnamon-flavored apple pie. ____________. In the past, individuals traveled the world seeking exotic spices for profit and, in searching, have changed the course of history. Indeed, to gain control of lands harboring new spices, nations have actually gone to war.

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#Question id: 10369

#6. System Physiology – Plant

Which type of the nitrogen-fixing bacteria are thought to maintain a low oxygen concentration (microaerobic conditions) through their high levels of respiration

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#Question id: 18391

#12. Applied Biology

Detoxification of organophosphate pesticides in the environment is performed by