All of the following are either structures or characteristics of members of the Class Bivalvia of the Phylum Mollusca except  

A.  the mantle.
B.  a radula.
C.  a shell.
D.  gills.
E.  open circulation.


B.  a radula.

Biology & Microbiology

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The most fundamental and important molecule that distinguishes living systems from nonliving matter is ____

a. protein b. DNA c. fructose d. water e. glucose

Biology & Microbiology

Differentiate between endotoxins and exoenzymes

What will be an ideal response?

Biology & Microbiology

Which of the following statements is NOT

correct about autosomes?

a. Autosomes are chromosomes that are found in both males and females. b. In a human cell, all chromosomes are autosomes, except chromosomes "X" and "Y." c. In birds, moths, and butterflies, autosomes determine the sex of the individual. d. A characteristic carried by autosomes would be passed to offspring males and females. e. More than one of these statements is incorrect.

Biology & Microbiology

Short, noncoding, guanine-rich DNA sequences found at the ends of chromosomes are called telomeres

__________________ Indicate whether the statement is true or false.

Biology & Microbiology