Based on new information from the Human Microbiome Project, the human body typically begins to be colonized by its normal biota
A. during puberty.
B. during and immediately after birth.
C. before birth, in utero.
D. when a child first goes to school.
E. when an infant gets its first infectious disease.
Answer: C
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Which fungi are responsible for infecting hundreds of plant species and cause the loss of millions of pounds of produce each year?
A. Tobacco mosaic virus B. Agrobacterium tumefaciens C. White and Grey mold fungus D. Cryphonectria parasitica, which also causes chestnut blight.
Which group of organisms is not classified as ectotherms? a. All of these choices are ectotherms
b. Fish c. Amphibians d. Lizards e. Mammals
Which statement about mitochondria is true?
a. Mitochondria are surrounded by two membranes b. Mitochondria are less than 1 micrometer in length. c. Mitochondria are able to survive outside the cell. d. Mitochondria have linear DNA chromosomes.
The process used to control the level of water and ions in body fluids is termed
A. thermoregulation. B. mechanoregulation. C. chemoregulation. D. hemoregulation. E. osmoregulation.