Which of the following describes a viroid?
a. enveloped viral particle with double-stranded DNA enclosed by a capsid
b. infectious proteinaceous particle with no associated nucleic acids
c. infectious RNA particle
d. a simple prokaryote with only a membrane and a nucleoid region
c. infectious RNA particle
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Goblet cell hyperplasia is associated with asthma. Based on their function, what is the likely outcome of an overabundance of goblet cells?
A. decreased mucus production B. excess mucus production C. excess O2 absorption D. decreased CO2 absorption Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about goblet cells? What other information is related to the question? Choose Answer Given what you now know, what information 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?
What is a negative feedback loop? How does this apply to sperm production?
What will be an ideal response?
The lowest part of the uterus is the
a. vagina. b. vulva. c. oviduct. d. cervix. e. urethra
These organisms have radial symmetry and a water vascular system and are generally bottom-dwellers.
(A) Echinoderms (B) Annelids (C) Arthropods (D) Cnidarians (coelenterates) (E) Chordates