Amoebozoans can be multicellular during part of their lifecycle through:
A. Amoebozoans are never multicellular.
B. binary fission.
C. symbiosis.
D. aggregation of cells.
D
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Production of exotoxin A and several proteolytic enzymes and hemolysins are factors that contribute to the pathogenicity of which organism?
a. P. aeruginosa b. Burkholderia cepacia c. Ralstonia pickettii d. Burkholderia mallei
An unusual red sponge is discovered near a deep-sea vent. You want to determine if this is a new species of sponge, so you separate the cells for further study. A new lab assistant accidentally adds cells from a blue sponge to your preparation while you are at lunch. When you return, you find that the sponge cells have reaggregated into a multicellular organism. What do you see if the red and blue sponges are the same species?
A. one sponge with a red side and a blue side B. one blue sponge and one red sponge C. one sponge with blue and red randomly distributed D. one purple sponge (mix of red and blue colors) E. one sponge with alternating red and blue layers of cells
The movement of organic compounds in phloem is
described as a. sink-to-source. b. pressure flow. c. cohesion-tension. d. active transport. e. transpiration pull.
Your roommate is on an ultralow fat diet to try to lose weight. Given what you know about structure of the nervous system, what advice would you give him?
A. "You should eat some healthy unsaturated fats, like those found in fish, olive oil, and nuts, because your brain needs fatty acids to build the myelin sheaths around your axons." B. "You should drink large quantities of water, because the brain is mostly water." C. "You should eat trans fats, from donuts, because 'trans' is short for neurotransmission." D. "Good for you! Losing weight by any means necessary can only help your brain."