At the doctor's office, you may have noticed that when you are asked to "breathe deeply," your chest rises and falls more dramatically than when you are breathing normally. Why?
A. Your intercostal muscles are being used to
expand your chest cavity.
B. Your spiracles are being used to expand
your chest cavity.
C. Your air sacs are being used to expand
your chest cavity.
D. Your bronchioles are being used to
expand your chest cavity.
A
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Seedless vascular plants most likely evolved
directly from
a. bryophytes. b. angiosperms. c. ferns. d. gymnosperms. e. green algae
Loams are soils with the best water and oxygen
penetration because they have a. a high proportion of sand. b. a high proportion of silt. c. a high proportion of clay. d. high proportions of sand and silt and a low proportion of clay. e. equal proportions of sand, silt, and clay.
Which of the following soil minerals is most likely leached away during a hard rain (ie, dissolve easily in soil water)?
a. H+ b. Ca++ c. K+ d. Na+ e. NO3-
Yellow pea color is dominant over green pea color, despite the observation that most store-bought, edible peas are green
Indicate whether the statement is true or false