The number of trophic levels an ecosystem can support is driven by (select all that apply)
A- The amount of energy available (primary productivity)
B-The speed of nutrient cycling (decomposition)
C- The population size of top predators in the ecosystem
D-The efficiency of energy transfer across trophic levels
E- The composition of the plant community
Answer:
A- The amount of energy available (primary productivity)
D-The efficiency of energy transfer across trophic levels
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Which of the following is the correct order of plant adaptations, from oldest adaptation to youngest adaptation?
A. Flowers, seeds, vascular tissue B. Seeds, flowers, vascular tissue C. Vascular tissue, flowers, seeds D. Vascular tissue, seeds, flowers
An ideology is a:
A) set of reinforcing beliefs and values that constructs a worldview. B) process by which groups of people make collective decisions. C) cultural system that creates powerful and long-lasting meaning. D) process of cultivation or improvement.
Adhesion proteins and ____ help guide the growth of the pollen tube in the proper direction towards the egg.
A. differentiation upon contact with the flower B. exposure to moisture C. species-specific signaling molecules D. electromagnetic impulses from the flower E. insertion of the pollen tube
An unbranched polymer composed of simple sugars is
A. cellulose. B. triglyceride. C. starch. D. glycoprotein. E. glycogen.