Which of the following is a difference between RNA and DNA?
A) RNA is single-stranded and DNA is usually triple-stranded.
B) DNA contains adenine and RNA does not.
C) RNA has ribose sugar and DNA has deoxyribose sugar.
D) RNA is made from nucleotide monomers and DNA is made from amino acid monomers.
Answer: C
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Based on the phylogeny shown, which characteristic is homoplastic?
A. tree
B. needles
C. flowers
D. seeds
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about cladistics?
Consider Possibilities
· Consider the different answer options. Which can you rule out?
Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Successful anti-HIV drug therapies today work by blocking the action of viral reverse transcriptase. Select which step of virus multiplication that would be directly blocked by this mechanism.
A. Adsorption B. Assembly C. Penetration D. Synthesis E. Release
Which of the following methods do fungi use in order to penetrate the initial layer of a plant's defenses?
A. mechanical bridging B. sharp mouthparts C. entry through stomates D. secretion of phospholipids to dissolve the cuticle
The study and diagnosis of antigen-antibody interactions in the blood is known as
A) immunology. B) hematology. C) serology. D) cytology. E) histology.