Which class has two shells hinged at the dorsal side and lack a radula?

a. Monoplacophora
b. Gastropods
c. Scaphopoda
d. Bivalvia


d. Bivalvia

Members of the class Bivalvia have two shells hinged at the dorsal side and lack a radula. Clams, oysters, and scallops are members of this class, and are found in marine and freshwater habitats.

Biology & Microbiology

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Burning fossil fuels releases carbon dioxide into the atmosphere. This additional carbon dioxide is causing a phenomenon called global warming. Which process "put" the carbon into our fossil fuels? Explain the process

What will be an ideal response?

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If both homologous chromosomes of each pair exist in the same nucleus, that nucleus is

a. diploid. b. unable to undergo meiosis. c. haploid. d. none of the above.

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Contractions of the dome-shaped __________ and the intercostal muscles between the ribs alter the

volume of the thoracic cavity during breathing. Fill in the blank(s) with the appropriate word(s).

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Dideoxynucleotide sequencing methodologies rely on the ability of dideoxynucleotides to facilitate chain extension after incorporation by DNA polymerase.

Answer the following statement true (T) or false (F)

Biology & Microbiology