Which of the following statements best compares a pseudocoelom and a coelom?
A. A coelom is completely enclosed by mesoderm whereas a pseudocoelom has an outer covering of mesoderm and an inner one of endoderm.
B. A pseudocoelom is completely enclosed by mesoderm whereas a coelom has an outer covering of mesoderm and an inner one of endoderm.
C. The coelom is enclosed by ectoderm and the pseudocoelom is enclosed by endoderm.
D. The pseudocoelom is enclosed by ectoderm and the coelom is enclosed by endoderm.
E. The coelom is enclosed by ectoderm and the pseudocoelom is enclosed by mesoderm.
A. A coelom is completely enclosed by mesoderm whereas a pseudocoelom has an outer covering of mesoderm and an inner one of endoderm.
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All of the membranes of the eukaryotic cell are in dynamic continuity except for the:
A. mitochondria and chloroplasts. B. endoplasmic reticulum. C. golgi apparatus. D. nuclear membrane.
The field of evo-devo:
A. All of these options are correct. B. examines the genetic and developmental mechanisms of evolutionary change. C. aims to understand the genetic differences that underly differences in form and function between species. D. examines the molecular mechanisms that guide development in individual species. E. compares the genetic programs for growth and development in different species.
Why would bacteria evolve so that the presence of tryptophan inhibits its own production?
A. Producing the enzymes that synthesize tryptophan is metabolically expensive, so it is wasteful to make them when tryptophan levels are high and its synthesis is not necessary. B. Producing high levels of tryptophan inhibits the production of other amino acids, so inhibiting its production allows all amino acids to be synthesized at equal concentrations. C. High levels of tryptophan causes cells to become unresponsive to external stimuli, so its production must be regulated. D. High levels of tryptophan inhibit cellular respiration and the synthesis of ATP, so its production must be regulated. E. All of these choices are TRUE
Lining of the ventral body cavities, lining of the heart and blood vessels, lining glomeruli, inner lining of the cornea, gas exchange surfaces in lungs
A. Pseudostratified columnar B. Simple columnar C. Simple cuboidal D. Simple squamous E. Stratified squamous F. Transitional