A scientist is studying a relationship in which one species hunts and eats the other as food. Which type of relationship is the scientist studying?
a) commensalism
b) parasitism
c) predation
d) mutualism
Ans: c) predation
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What will be an ideal response?
Which of the following is a single-layered, hollow ball of 16 cells?
a. cleavage b. morula c. gastrula d. zygote e. blastula
Action potentials traveling down the plasma membrane of a muscle fiber will next reach the _____ after leaving the T tubules.
A. mitochondria B. neuromuscular junction C. cytoskeletal system D. sarcoplasmic reticulum E. endomembrane system
A(n) ________ is a layer of protein or glycoprotein that exhibits a pattern resembling floor tiles.
Fill in the blank(s) with the appropriate word(s).