Compare and contrast isotonic, hypotonic, and hypertonic solutions. What happens when a normal animal cell finds itself in any of the three kinds of solutions?
What will be an ideal response?
Osmotic pressure forms in a cell when there is a difference in solute concentrations on either side of the membrane. There are three possible solutions within a cell. Isotonic solutions have equal osmotic pressure on both sides of a membrane, so there is no net movement of water across the membrane. A hypotonic solution has less osmotic pressure, or more water, than the solution across the membrane. A hypertonic solution has a greater osmotic pressure (less water). Cells in hypertonic solutions lose water, whereas cells in hypotonic solutions gain water.
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Match each of the following cellular processes with the phase of the cell cycle in which it occurs
Phase of the cell cycle Cellular processes first gap phase a. separation of genetically identical daughter cells second gap phase b. expression of regulatory proteins and enzymes required for replication S phase c. synthesis of cell components required for mitosis M phase d. separation of replicated chromosomes so that each daughter cell gets the same complement of chromosomes cytokinesis e. replication of DNA What will be an ideal response?
True or False: An individual E. coli bacterium, much like a population of E. coli, can evolve antibiotic resistance
A. true B. false
What is produced within the anthers?
a. ovules b. stamens c. microspores d. female gametophytes e. megaspores
The sex of all animals is determined by chromosomes.
Answer the following statement true (T) or false (F)