Identify the viral structure described. have a capsid that has polyhedral and helical characteristics, and may have extra structures like protein tails. Bacteriophages are examples.

have an outer lipid bilayer known as a viral envelope, which is studded with proteins. Influenza and HIV are examples.

have many triangular faces. Most have 20 triangular faces and 12 corners. Polio and the papilloma virus are examples.

have long narrow capsids shaped liked cylinders. Rabies and ebola are examples.

Which sentences describe the logistic growth model? there are three different phases of the s-shaped curve. at first, growth is exponential because individuals are few and resources are plenty. this growth model occurs in a situation where resources are plenty and individuals are few to consume the resources. population growth decreases as resources become limited. when a population size reaches the carrying capacity of its environment, the population growth slows down or stops completely. the model looks like a j-curve.