What would happen if the foramen ovale and ductus arteriosus failed to close?
1.The left side of the heart would serve no role.
2.No blood would go to the lungs.
3.The aorta would be damaged by the input of excessive blood.
4.The oxygen levels of the blood would drop.
4
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The changeover in production from IgM to IgG by an activated B cell is called a ________ event.
Fill in the blank(s) with the appropriate word(s).
The plasma membrane is composed of ____
a. water and salts b. proteins c. nucleic acids d. primarily phospholipids e. proteins and carbohydrates
The ratio of energy consumed at the next trophic level over what is produced is known as
A) consumption efficiency. B) trophic efficiency. C) food chain efficiency. D) detrital efficiency.
Primary growth involves:a
an increase in length. b. an increase in girth. c. a production of secondary xylem. d. a production of cork cells. e. a division of vascular cambium cells.