The various flower parts are attached to the
a. style.
b. receptacle.
c. stigma.
d. corolla.
e. calyx.
Answer: b
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Endospores can be inactivated by
A. incineration. B. dry heat at 170°C for 2 hours. C. glutaraldehyde for 3 or more hours. D. ethylene oxide for 3 or more hours. E. All of the choices are correct.
Which tissue type includes fat and blood?
A) muscle B) connective C) epithelial D) nervous
Recent discoveries of microscopic fossils have extended the known history of life to about:
A. 1 billion years ago. B. 4.5 billion years ago. C. 3.5 billion years ago. D. 2 billion years ago.
Males that tend to be taller than average and show mild mental impairment may have
A. XXY chromosomes. B. XYY chromosomes. C. Turner syndrome. D. Down syndrome. E. Klinefelter syndrome.