BIO 181 Exam 1 Questions and answers, 100% Accurate. Graded A+.

BIO 181 Exam 1 Questions and answers, 100% Accurate. Graded A+. What limits the paramecium from acquiring more complex functions? - -number of Bio molecular machines T/F? The paramecium swims by way of using a flagella. - -False The paramecium discussed in class contained an organelle called the contractile vacuole. This is the presumed precursor of the: - -Kidney T/F? A cancer cell will be anchorage-dependent for growth and immortal. - -False Comparing a single-celled eukaryotic organism with a multicellular organism such as yourself identify the major difference - -Division of labor Traits of a A single-celled eukaryotic organism - -Limited number of biomolecular machines, must find food, shelter, and a mate to reproduce. Must escape from predators. T/F?In your own multicellular body, cells with different functions have different DNA. - -False In order to examine cells which are smaller than can be detected by the human senses what needs to be used? - -Technology Compared to bacteria which of the cell types below are not responsible for finding food" - - Lymphocyte, macrophage, fibroblast In Cell Biology what can limit the progress of science? - -Technology T/F?The contractile vacuole of the paramecium is possibly an evolutionary precursor of the kidney. - -True A cell that is itself an organism must have a minimum of four needs presented in lecture. List these four things. - -1. Chemical Complexity 2. Growth and reproduction 3. Ability to refashion substances from the environment 4. Ability to determine what can move into and out of the organism explain what limits an individual cell from becoming more complex - -The individual cell is responsible for reproduction, growth, finding mates, gathering food, etc. The increased responsibilities of the cell force it to focus on just one thing at a time. In short, the single cell must do all of the labor by itself. Another caveat to an individual cell is when the cell changes it's function it also changes its engineering. In comparison, a multi-cellular organism is able to redistribute the work load and work as a unit with the many cells in the body. Naturally, the multi-cellular organism is able to accomplish more things by having fixed cells focused on different tasks to accomplish more at a faster rate. These cells experience differential gene expression which means that the DNA in the cells are identical but there are only certain subsets in each cells that are turned on based on the cell's individual function. T/F? A cell that is anchorage-dependent for growth will also exhibit contact inhibition. - -True T/F? In your own multicellular body, different cells in your body have a division of labor between them. - -True T/F? A normal cell is anchorage-dependent for growth and mortal. - -True T/F? The presumed first step in the transition of the primitive, proto-prokaryotic cell into the primitive, proto-eukaryotic cell was the loss of the cell wall. - -True T/F? In an extant prokaryotic cell, the outer boundary of life is the capsule. - -True T/F? The ancient earth did not contain much oxygen. - -True T/F? The end of the retraction fiber touching the cell culture plate still contains the cell equivalent of super-glue. - -True T/F? Loss of the cell wall was required for the endomembrane system theory. - -True T/F? It is presumed that the peroxisomes evolved in these primitive, proto-eukaryotes to remove oxygen, which was toxic to the primitive cells. - -True What limits how big a cell can be? - -The surface area to volume ratio Motility improved the fitness of these early cells because: - -It allowed them to move away from predators and towards food. T/F? When cancer cells are crowded by surrounding cells, the cancer cells become spherical and they can still go through cell division. - -True