Which structures make up the outermost whorl of a flower?
a. the receptacles
b. the carpels
c. the petals
d. the sepals
Ans: d. the sepals
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The time it takes for half of the atoms in a radioisotope sample to decay is called the ____
a. decay time b. half-life c. isotopic life d. release time e. denature time
What theory explains the ability of the electron transport system to pump protons between the inner and outer mitochondrial membranes?
What will be an ideal response?
Which of the following statements concerning ATP is FALSE?
a. It is a nucleotide. b. It is called the energy currency of the cell. c. It contains phosphate groups joined in a series. d. It stores energy for long periods. e. It contains phosphate groups joined by unstable bonds.
When natural selection tends to split a population into two phenotypic groups, it is called
A) balanced polymorphism. B) stabilizing selection. C) coevolution. D) gene flow. E) genetic drift.