Living organisms are categorized into two major groups based on the presence or absence of a nucleus. What group is defined by the presence of a nucleus?
A) prokaryotic organism
B) virus
C) bacterium
D) mitochondrial organism
E) eukaryotic organism
Answer: E
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Macrophages are phagocytic cells.
Answer the following statement true (T) or false (F)
Which of the following tissue types is characterized by having cells suspended within an extracellular matrix consisting of a mixture of fibrous proteins and carbohydrates?
A. Muscle B. Nervous C. Epithelial D. Connective E. Digestive
Transposons are frequently used as cloning vectors.
Answer the following statement true (T) or false (F)
Which reaction represents cellular respiration?
A) Sugar + Oxygen ? Carbon dioxide+ Water + ATP B) Carbon dioxide + Water + ATP ? Sugar + Oxygen C) Oxygen + Carbon dioxide ? Sugar + Water + ATP D) Water + ATP ? Carbon dioxide + Sugar