Meiosis Matching a. prophase I
b. metaphase I
c. anaphase I
d. telophase II/cytokinesis
e. prophase II
f. metaphase II
g. anaphase II
h. telophase II/cytokinesis
i. interphase
1. tetrads line up at equator
2. DNA replication occurs
3. daughter cells divide forming 4 haploid cells
4. synapsis occurs
5. sister chromatids separate
6. crossing over occurs
7. spindle fibers attach to centromeres of tetrads
8. two daughter cells are created
9. centrioles move to opposite poles
10. homologous pairs separate 11. random assortment occurs

With the description of the different cell walls, membranes, and associated proteins set in the students' minds, you now need to introduce them to the idea that the cell wall can also act as a foundation to build things upon. bacterial appendages require a strong foundation that will offer the support needed to move and function in a dynamic world. for example, flagella are long, whiplike protein structures that are used by many gram-positive and gram-negative bacteria for locomotion. in order to function effectively, a flagellum must be firmly anchored to the cell wall. how will you be able to get across the idea that the peptidoglycan cell wall is strong enough to support such a mechanism? with a protein rod that passes through the cell wall and protein rings used to anchor it in the membranes, these basal bodies are the rudimentary biological motors that use atp power to spin the hook and the flagella attached to it. bacterial flagella have a biological motor that spins within the cell wall and is powered by atp. this allows the flagella to spin in a whiplike motion to propel the bacterium.

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

Which beat describes the brain stem