Which of these is a heterotroph?
A. plant
B. producer
C. consumer
D. phytoplankton

Chicken pox and hepatitis are bacterial diseases. true or false?

Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm? a) it produces seeds. b) it retains its fertilized egg within its archaegonium. c) it lacks gametangia. d) it undergoes alternation of generations.

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection