The repeated contraction and relaxation of the smooth muscle in the intestinal wall creating a backand-
forth movement is called
a. peristalsis.
b. regurgitation.
c. segmentation.
d. motility.
e. emulsification.
C
You might also like to view...
Solar aquatic systems constructed by biologist John
Todd work with all of the following EXCEPT a. decomposers that degrade waste. b. plants that grow on nutrients released. c. heat from sunlight that speeds degradation. d. an artificial marsh used to filter algae. e. aquatic fish and birds used to finish the process.
If a parent cell undergoing mitosis has 18 chromosomes, each daughter cell will have _____ chromosomes
Fill in the blank(s) with correct word
Which of the following is a characteristic seen in prophase I that does NOT occur in prophase II?
A) Chromosomes move to the middle of the cell. B) Spindle formation occurs. C) The number of chromosomes doubles. D) Crossing over occurs.
A secondary plant compound might be used for which of the following?
a) a new crop variety b) a new drug c) a soil nutrient d) a crop pest