Active transport can only move a substance with a concentration gradient
1.True
2.False
2
Biology & Microbiology
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Cells that can break down bone matrix by secreting enzymes and acids are called ________
a. osteocytes b. osteoclasts c. marrow d. osteoblasts
Biology & Microbiology
All of the following are filter feeding dwellers of coral reefs except:
a. Christmas tree worms. b. sponges. c. giant clam. d. cone snails. e. tunicates.
Biology & Microbiology
Which of the following possess an incomplete
digestive system? a. annelids b. flatworms c. mollusks d. arthropods e. echinoderms
Biology & Microbiology
A tumor that has gained the ability to spread throughout the body, generally with life-threatening consequences, is known as a _____ tumor.
a. benign b. polyp c. malignant d. growth-promoting
Biology & Microbiology