Four of the five structures listed below are parts of
the same sense organ. Select the exception.
a. ommatidium
b. retina
c. crystalline cone
d. photoreceptor
e. lens
Answer: b
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Microsporidians are considered parasitic because of the ability to penetrate their host cells using _____
A) a mycelium B) a polar tube C) sporangia D) chitin
The process of removing introns from mRNA and joining exons together occurs in a complex called the ____
a. ribosome b. anticodon c. lariat d. polysome e. spliceosome
The isotope 14C undergoes radioactive decay with a neutron splitting into an electron and a proton
This decay produces an atom of
a. iron. b. carbon. c. hydrogen. d. oxygen. e. nitrogen.
Which statement about the cytoskeleton is correct?
a. Microfilaments are narrower than both intermediate filaments and microtubules. b. Microfilaments resist compressive forces on the cell and help it to retain its shape. c. Intermediate filaments provide pathways for organelles to follow during cell division. d. Microtubules are involved in movement external to the cell but not internally.