In their basic body plan, mollusks have a visceral mass covered with a soft epithelium and a muscular ________ that is used in locomotion.
Fill in the blank(s) with the appropriate word(s).
Foot
foot
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A B cell CstF-64 mutant will likely:
A. constitutively secrete IgM antibodies. B. selectively remove the VDJ region from IgM antibodies. C. cut IgM pre-mRNA at every available 3'-end cleavage site. D. undergo IgM pre-mRNA splicing between the heavy chain exons and the membrane anchoring exon.
The exact same genotype is seen only in
a. identical twins. b. members of a family. c. non-identical twins. d. members of a population. e. brothers and sisters of different ages.
The sum total of all the chemical reactions that occur in organisms is called ________
A) hydrolysis B) cellular synthesis C) conservation of energy D) metabolism
A heart with three chambers, one atrium, and two ventricles is shared by _____.
A. reptiles and mammals B. reptiles and amphibians C. amphibians and mammals D. birds and mammals E. birds and reptiles