Which one of the following is TRUE regarding the flow of energy through an ecosystem?
A) Energy flows from the sun to consumers and then to producers.
B) Energy flows in multiple directions through an ecosystem.
C) Energy is cycled through an ecosystem and rarely lost as heat.
D) Energy flows from the sun to producers and then to consumers.
E) As energy flows through an ecosystem, it does not change form.
D
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What structure cements plant cells together?
A. middle lamella B. hemidesmosomes C. plasmodesmata D. primary cell walls E. adherens junctions
Which organ, gland, or tissue normally occurs in pairs in males?
a. glans b. corpus spongiosum c. corpus cavernosum d. prostate
Endemic species occur in one area and nowhere else on earth
1.True 2.False
Which of the following enzymes is associated with the formation of peptide bonds?
A) peptidase B) aminoacyl transferase C) peptidyl transferase D) peptide hydrolase E) inteins