The proplastids associated with giving flowers and fruits their distinctive colors are the
A) chloroplasts.
B) elaioplasts.
C) amyloplasts.
D) chromoplasts.
E) plastids.
D) chromoplasts.
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The human population on Earth is expected to reach 9.7 billion people by
A) 2015. B) 2050. C) 2093. D) 3150.
Which of the following is not true about the G + C content percentages in DNA of organisms?
A. Similar G + C percentages only suggests relatedness if the two organisms are also alike phenotypically. B. Organisms with different G + C percentages have dissimilar base sequences. C. Organisms with similar G + C percentages have similar base sequences. D. All of the choices are correct.
____detect changes in pressure and convert this stimulus energy into ____
a. Thermoreceptors; action potentials b. Mechanoreceptors; action potentials c. Chemoreceptors; resting potentials d. Photoreceptors; resting potentials e. Osmoreceptors; threshold potentials
The letter "E" above represents the ____
a. uterus b. ovary c. vagina d. urinary bladder e. pelvic girdle