Heart cells in the embryo will be derived from which germ layer?
A) mesoderm B) ectoderm C) endoderm D) none of the above
Answer: A
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When sodium ions move from one cardiac muscle cell to an adjacent cell, causing them to contract in unison, this is an example of ____.
A. autocrine signaling B. paracrine signaling C. contact-dependent signaling D. endocrine signaling E. direct intercellular signaling
The two regions of the ocean that have remained relatively unexplored yet are believed to be rich in species diversity are the ________ and the ________
a. pelagic province, seamounts b. seamounts, continental shelf c. benthic province, hydrothermal vents d. hydrothermal vents, continental shelf e. seamounts, hydrothermal vents
Compare and contrast giardiasis and amebiasis with regard to: a) causative agent, b) transmission, c) infection site in body, d) signs and symptoms, e) prevention, and f) treatment.
What will be an ideal response?
Instead of linear chromosomes like humans have, prokaryotes arrange their DNA into which of the following?
a. an X-shape b. a Y-shape c. a loop d. a cube