You are in biology lab examining plant root cells. You can still see chromosome strands, as they are in compact bundles. You conclude the cells are undergoing cytokinesis because you also observe the formation of the
A. cleavage furrow.
B. cell plate.
C. nucleolus.
D. nuclear envelope.
E. spindle fiber.
B. cell plate.
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If you examined a cross section of a woody stem under the microscope and located the vascular cambium, the tissues on the inside of the vascular cambium ring (towards the center of the stem) would be
A. xylem (primary and secondary). B. xylem (only primary). C. phloem (primary and secondary). D. phloem (only secondary). E. phelloderm. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the different tissues in a woody stem? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Pairs of duplicated chromosomes produced during S phase are called ______
a. homologous chromosomes b. sister chromosomes c. sister chromatids d. heterologous chromosomes e. homogeneous chromosomes
Hox genes have been identified in:
a. bilaterally symmetric animals only. b. radially symmetric animals only. c. asymmetric animals only. d. both asymmetic and radially symmetric animals only. e. both bilaterally symmetric and radially symmetric animals only.
Which of the following features are shared by all of the jawed fish?
A. ectothermic, smooth nonscaly skin and bony skeleton B. bony exoskeleton, gills and scales C. cartilaginous or bony endoskeleton, gills and scales D. endothermic, gills and scales