Comparing the human and mouse genomes has revealed that
a. the mouse and human share few genes.
b. the mouse and human genomes are identical.
c. the mouse and human genomes have no genes in common.
d. the mouse and human share most genes.
e. the mouse and human genomes have identical noncoding DNA
D
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Secondary immune responses upon a second exposure to a pathogen are due to the activation of _____
A) memory cells B) macrophages C) stem cells D) B cells E) T cells
Which of these structures is not likely to contain significant amounts of aerenchyma tissue?
A. mangrove pneumatophores B. rice roots C. water lily leaves D. cypress "knees" E. coconut tree roots
A liver cell responds to insulin by
A) Taking in glucose and converting it to glucagon. B) Taking in glucose and converting it to glycogen. C) Breaking down glycogen and releasing glucose. D) Releasing glucagon. E) Releasing insulin.
An organism that grows slowly in the cold but has an optimum growth temperature of 32°C is called
A. a psychrophile. B. an extremophile. C. a thermophile. D. a facultative psychrophile. E. thermoduric.