Q1. If molecular mass of a carbon atom is 12, the mass of a hydrogen atom is 1, and the mass of an oxygen atom is 16 daltons, how numerous molecules does one mole of table sugar (sucrose; C12H22O11) contain? Q2. Noah is a technician assigned to photograph chromosomes. At […]

1. The process of manufacturing new DNA which occurs during the s phase of the cell cycle is called translation T/F 2. Replication and transcription both require a DNA template and can only occur in the nuclei of eukaryotic cells. T/F 3. Transfer RNA (tRNA) molecules carry amino acids to […]

Mammals 1. What are the typical features of mammals? 2. What are the three major groups into which mammals are divided? 3. Do all mammals have a placenta? 4. What are the major orders of placental mammals? What are a few representative species and distinguishing features of each of those […]

Photosynthetic protists are a diverse group of eukaryotic organisms that range from unicellular algae to large multicellular seaweeds. They form the base of the food chain in aquatic ecosystems and produce much of the atmospheric oxygen. They do not cause diseases but they can produce substances that are harmful when […]