BIOL 206 Midterm: Questions for chapter 5-10
Document Summary
Qs #4: t or f leaves have a distinct top side and bottom side. A: palisade and spongy mesophyll: t or f- vascular cambium produces waxy walled protective cells that may become bark. As plants cells take up water they begin to swell. However, the presence of cell wall provides resistance to swelling. Body points radiate out from a certain point. Body parts are arranged around one main axis at the body"s center. Ex: humans, monkeys, elephants etc: describe the different body cavities. Acoelomate- such as flatworms lack and enclosed fluid filled body caity. Instead speace between gut and mesoderm is filed with masses of cells. Psudocolmate- have body cavity with fluid filled space lying between endoderm and mesoderm. Coelmate- have a body cavity that developes with mesoderm. The sequence of early cell division that transforms the diploid zygote into mass of undifferentiated cells that will develop as an embryo. Dna replication but no cell growth and little gene expression.
