Digestive systems mechanically and chemically degrade food into small molecules that can be _______________ into the internal environment
Fill in the blank(s) with correct word
absorbed
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Which of the following activities does not require cellular energy?
A. movement of organelles within cells B. swimming movements of some types of cells C. movement of water across the cell membrane down the concentration gradient D. driving endergonic reactions
Suppose you are a botanist and you discover a plant that has a dominant gametophyte, but no xylem or phloem. Into which group should you classify this plant?
a. angiosperms b. gymnosperms c. seedless vascular plants d. bryophytes
The substrate in the Simmon's Citrate Agar is
A. ammonium citrate B. potassium citrate C. ferric citrate D. ferrous citrate E. sodium citrate
What is the name of the frigid ecosystem bordering the North Pole?
A. prairies B. taiga C. coniferous forests D. temperate forests E. tundra