Urine cannot escape back to the ureter from the bladder because there is/are blocking the way.
a. A valve
b. mucosa
c. Two valves
d. A flap of muscle
Answer: b. mucosa
Biology & Microbiology
You might also like to view...
In general, control groups should be ________
a. older than the experimental group b. more fit than the experimental group c. more diverse than the experimental group d. as similar as possible to the experimental group
Biology & Microbiology
The tonoplast is another name for
a. the plant nuclear envelope. b. a chloroplast. c. the cell wall. d. an undifferentiated plastid. e. the vacuolar membrane.
Biology & Microbiology
What is the term for a single main root that is adapted for storage and which typically grows downward and fairly deep?
a. a rhizome b. a tuber c. a taproot d. a fibrous root
Biology & Microbiology
bad lipoproteins
What will be an ideal response?
Biology & Microbiology