Which of the following correctly lists the structures in order from smallest to largest?
a. nucleotide, DNA, chromatin, genome
b. genome, chromatin, nucleotide, DNA
c. DNA, nucleotide, genome, chromatin
d. chromatin, genome, DNA, nucleotide
A
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Villi and microvilli in the small intestine _____
A) neutralize stomach acid B) activate trypsinogen C) increase the surface area to increase the efficiency of nutrient absorption D) emulsify lipid molecules
The skin of sharks is covered with scales called:
a. placoid. b. cycloid. c. ctenoid. d. ganoid. e. circular.
Cells that provide direct protection and physical support to neurons are
A) located only in the spinal fluid. B) found primarily in lymphatic fluids. C) myelinated. D) neuroglial cells. E) nodes of Ranvier.
During prophase, ____ is(are) compacted into visible chromosomes
a. chromatin b. centrioles c. centromeres d. kinetochores e. tetrads