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This set of MCQs helps you brush up on important biology topics and prepare you to dive into skill practice.
_______ are chemical substances that control a plant's patterns of growth and development, and the plant's responses to environmental conditions.
Alleles
Plant hormones
Auxins
Cytokinins
______ is the periodic movement from one place to another and then back again.
Cycles
Migration
Circadian
Pheromones
_____ produces dramatic increases in size, particularly in stems and fruit.
Auxins
Tropisms
Gibberellins
None of these
What is an ecological model of the relationships that form a network of complex interactions among organisms in a community from producers to decomposers?
Population
Ecosystem
Food web
Food chain
What is the term for each step in the transfer of energy and matter within a biological community?
Food pyramid
Energy path
Food web
Trophic level
What percentage of energy passes to the next trophic level ____?
90%
100%
10%
1%
What is a Diagram that shows the energy available at each trophic level ?
Succession
Energy pyramid
Cellular respiration
Biochemical cycle
Which organism converts nitrogen gas into a usable form?
Bacteria
Plants
Cows
Lion
