Define an ecological footprint.
A. the amount of land a person needs to provide a place to live
B. the amount of energy a person needs to meet his/her needs
C. the amount of water a person needs to meet his/her needs
D. the total amount of resources used by an individual to meet his/her needs
E. the amount of food a person needs to eat
Answer: D
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Plastids originated from which of the following groups of prokaryotes?
A. Cyanobacteria B. Spirochaetes C. Proteobacteria D. Archaea E. Actinobacteria
The embryo develops from cells of the
a. blastocyst outer layers. b. blastocyst inner cell mass. c. gastrula mesoderm. d. gastrula ectoderm. e. gastrula endoderm
Which vertebrates rely on a positive pressure filling mechanism to move air into their lungs?
A. human B. crocodile C. eagle D. mouse E. bullfrog
When a sample is heavily populated with microbes, the microbes are generally visible to the naked eye.
A) True B) False