Which of the following are in order from primary producer to fourth trophic level?
a. grass ? coyote ? bird ?grasshopper
b. coyote ? bird ? grasshopper ? grass
c. bird ? grasshopper ? grass ? coyote
d. grass ? grasshopper ? bird ? coyote
e. grasshopper ? grass ? bird ? coyote
ANSWER: d
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Which plant organelle stores solutes and plays a major role in maintaining turgor pressure?
a. nucleus b. cell wall c. chloroplast d. vacuole e. mitochondrion
The three most common shapes of bacteria are:
a. Star-shaped, cubical, and spherical b. Spherical, rod-shaped, and spiral c. Cubical, spiral, and thread-like d. Rod-shaped, star-shaped, and cubical e. Cubical, spherical, and rod-shaped
Which of the following increases the reabsorption of water by inserting aquaporins into the membranes of the distal tubule and collecting duct cells?
A) Erythropoietin B) Aldosterone C) Angiotensin D) ADH E) Renin
Which of the following is a typical characteristic of molluscs?
A) a gastrovascular cavity with only one opening B) a sessile lifestyle C) an internal skeleton and segmented body plan D) a rasping organ called the radula