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

Biology & Microbiology

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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

Biology & Microbiology

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?

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology