The nucleic acids carried by viruses usually consist of
A. DNA.
B. RNA.
C. either DNA or RNA.
D. both DNA and RNA simultaneously.
Answer: C
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Eustachian tube connects the middle ear and which of the following?
Nucleosomes are bead-like structures ____
a. that form during interphase to assist with DNA uncoiling b. that are a major class of proteins in chromatin c. composed of histone wrapped with DNA d. composed of linked homologous chromosomes e. composed of pyrimidines and purines
Which of the following are important reproductive adaptations that allow plants to inhabit terrestrial environments?
A) Roots and leaves B) Flowers and leaves C) Seeds and pollen D) Gametophytes and sporophytes E) Leaves and stems
Which of the following structures encloses the flower before the flower opens?
a) petals b) corolla c) carpel d) calyx e) style