【单选题】Biology is the study of living things. Which characteristic applies to all forms of life?
A.
able to move from place to place
C.
carry out photosynthesis
D.
possess a nervous system
【简答题】Cell biology is the study of cells and their structure, function, and _______ .
【判断题】Molecular biology is the study of the different types of cells and how they work.
【单选题】_____________is the branch of biology involving the study of microorganisms.
【单选题】无向图的邻接矩阵是一个( ),有向图的邻接矩阵是一个( )
【单选题】关于结核菌素PPD试验下列操作不正确的是()