Comparing Viral Structures
Not all viruses are the same. Viruses can have
different shapes, different proteins, and different
types of genetic material. Based on the three
viruses pictured, what structural characteristics do
all viruses share?
A. Head and tail
B. DNA and a membrane envelope
C. Membrane envelope and a capsid
D. Genetic material and a capsid

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

What are potential sources of error in marta’s experiment

The cell membrane controls what enters and leaves the cell. which of the structures in the diagram below is the cell membrane? — f о