Compare and contrast the roles of cell division and morphogenesis in the development of an animal. What will be an ideal response?
Cell division results in an increasing number of cells, which causes the organism to increase in size.
Morphogenesis is the process by which those cells become progressively organized into the various
tissues and organs of the body. Morphogenesis occurs via pattern formation, the sequence of events
that involve cell signaling, changes in cell shape, cellular movement, interactions with the extracellular
matrix, and apoptosis
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Legume plants provide certain amino acids to the ________ so that they do not need to assimilate ________. In return, the bacteroids shuttle amino acids bearing the fixed nitrogen back to the plant.
A. bacteroids; ammonia B. bacteroids; nitrogen C. bacteroids; phosphorus D. root hairs; nitrogen
A closed circulatory system is seen in:
a. leeches only b. roundworms only c. flatworms only d. cnidarians only e. both earthworms and leeches
Smegma is produced by which gland?
A. Skene's B. Tyson's C. Bartholin D. Cowper's
The polysaccharides agarose and carrageenan are isolated from red algae for commercial use. These polysaccharides are found in cell walls. What plant polysaccharide are they analogous to?
A. Mannose B. elastin C. Cellulose D. Collagen E. Amylose