Marnee goes to the doctor because she has been coughing and sneezing. The doctor explains that a pathogen entered her cells and started replicating, which caused her to get sick. What was the cause of Marnee’s sickness? A) bacteria
B) fungi
C) protists
D) virus

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Four types of motile cells in human body?

What is the name for a substance formed in a chemical reaction