Paramecium lives in freshwater; a(n) __________ rids them of excess water.

Fill in the blank(s) with the appropriate word(s).


contractile vacuole

Biology & Microbiology

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The overall ecological efficiency of most organisms is between

a. 1 and 2 percent. b. 2 and 5 percent. c. 5 and 20 percent. d. 10 and 50 percent. e. 50 and 75 percent.

Biology & Microbiology

What is a substance that regulates development by affecting cells in a concentration-dependent manner?

a. gene b. nucleus c. cytoplasm d. morphogen e. cytokine

Biology & Microbiology

Each water molecule is joined to _____ other water molecules by ______________ bonds.

a) two ... polar covalent b) four ... hydrogen c) three ... ionic d) four ... polar covalent e) two ... hydrogen

Biology & Microbiology

T or F: A relative angle is also referred to as a joint angle

What will be an ideal response?

Biology & Microbiology