Sea stars belong to the
A. Holothuroidea.
B. Echinoidea.
C. Asteroidea.
D. Crinoidea.
Answer: C
You might also like to view...
What is the role of the villi?
A. To secrete digestive enzymes into the digestive tract B. To secrete water into the digestive tract C. To absorb small nutrient molecules from the digestive tract D. To move food along the digestive tract
In a solution at pH 7.0, a polymer of lysine (polylysine) is a random coil with no secondary structure. In order for it to possibly assume an ?-helix structure, the pH of the solution must be:
A. 4 B 6 C. 8 D. 10 E. 12
A ________ is a close association of fungi and plant roots that is beneficial to both
Fill in the blank(s) with the appropriate word(s).
The biologically available carbon that is produced within large, lentic rivers and lakes is called ________.
Fill in the blank(s) with the appropriate word(s).