In most land ecosystems, ____ food chains predominate
a. decomposer
b. detrital
c. producer
d. consumer
e. grazing
ANSWER: b
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Match each description below with the cell type it characterizes: a. melanocyte b. keratinocyte c. fibroblast
_______ Major cell type found in the dermis; its primary function to secrete extracellular matrix. _______ Found in the epidermis; its primary function is production of pigments to color skin. _______ Major cell type found in the epidermis; its primary function is to protect underlying tissues and organs. What will be an ideal response?
When a plant reaches sexual maturity, the genes that control the production of __________
are inactivated and the genes that control __________ are activated.
a. flowers; leaves b. flowers; roots c. leaves; flowers d. leaves; roots
Beneficial bacteria that synthesize vitamin K and some of the B vitamins are an important part of our digestion. The part of the digestive system where these bacteria are found is the ________
Fill in the blank(s) with correct word
Carbon first becomes part of a living thing as a result of
A. nitrogen-fixing bacteria. B. decomposer organisms. C. photosynthesis. D. aerobic respiration.