Not all sponges have skeletons. If they do, their skeletons may be made of (select all that apply)
A. silica
B. calcium carbonate
C. bone
D. protein
E. carbohydrate
A,B,D
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Discuss the relationship between genetic distance and physical distance between two linked genes
What will be an ideal response?
The liver converts the waste product ammonia to a much less toxic molecule of ____
a. alcohol b. bilirubin c. cholesterol d. bicarbonate e. urea
Corn and other grasses have a unique sheath of cells known as the __________ that surrounds and
protects the young shoot. a. coleoptile b. coleorhizum c. cotyledon d. endosperm e. radicle
________ are made by certain pathogens such as Staphylococcus, Salmonella, Escherichia coli, and Clostridium botulinum. These substances often travel in the bloodstream and cause disease symptoms
Fill in the blank(s) with correct word