In humans, if non-disjunction led to an individual with a genotype of XXY, that person would
A. be female because each cell has two X chromosomes.
B. be male because each cell has one Y chromosome.
C. display both male and female characteristics.
D. not survive.
B. be male because each cell has one Y chromosome.
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Clostridium botulinum and Bacillus cereus are important disease-causing microorganisms of food which cause ________.
A. cancers B. infections C. intoxications D. birth defects
Which statement best describes parasitism?
a. A parasite is harmful to the host. b. A parasite provides nutrients for the host. c. A parasite does not harm the host. d. A parasite does not receive any benefits from the host. e. A parasite always kills its host.
The outer membrane of Gram-negative bacteria
A) is a rigid, protective outer shell. B) is also referred to as endotoxin and stimulates fever and shock. C) is the site of nutrient exchange and allows sizes and shapes of molecules to pass through it. D) has the same chemical composition as the cell membrane.
Gametophytes are diploid; sporophytes are haploid.
a. true b. false