What does the tympanic membrane function for?
What will be an ideal response?
Answer: hearing
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Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures?
A) mitochondria and chloroplasts B) membrane proteins of the inner nuclear envelope C) free ribosomes and ribosomes attached to the ER D) components of the cytoskeleton E) cellulose fibers in the cell wall
A rosebush needs to increase the concentration of phosphorus in the water within its xylem. Assuming that there is plenty of usable phosphorus dissolved in the water of the surrounding soil, how can the rosebush achieve this?
A. by transporting more phosphorus across the root cortex B. by transporting more phosphorus across root hairs C. by transporting more phosphorus across the root endodermis D. by transporting more phosphorus across the epidermis of roots
When the head of the fetus presses on the cervix, it triggers a release of which hormone in the mother's body?
a. oxytocin b. GnRH c. progesterone d. prolactin
Pepsin is an enzyme that functions in the
stomach. Its optimum pH would be
a. between 1 and 2. b. between 3 and 4. c. above 6. d. between 5 and 7.5. e. above 8.5.