Cladograms ________ true family trees.
A. are not
B. are
Answer: A
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Which statement correctly explains the Gram stain reaction of archaeal cells?
A. Some are Gram-positive and some are Gram-negative due to the diverse chemical structure. B. They don't stain - basic dyes used in the Gram stain don't adhere to archaeal cells. C. They are Gram-negative due to the lack of peptidoglycan in their cell walls. D. They are Gram-positive due to the pseudomurein layer in their cell walls.
Which of the following junctions permits ions and small molecules to pass from the cytoplasm of one cell to another?
a. gap b. tight c. cell d. adhering
In the process of transcription, _____
A) DNA is replicated B) RNA is synthesized C) proteins are synthesized D) mRNA attaches to ribosomes
What is the outermost tissue layer in animals, or the epithelial layer of skin, also called?
A. Epidermis B. Dermis C. Hypodermis D. Glial cell layer E. Loose layer