The evolutionary innovation that first appeared in arthropods and is characteristic of the most successful of all animal groups is that of
A. bilateral symmetry.
B. coelomic body architecture.
C. jointed appendages.
D. segmentation.
E. three primary types of tissues.
C. jointed appendages.
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A college student spent the week hiking on the Appalachian Trail and then spends Friday night walking around New York City's Time Square. What was her ecological footprint during the week compared to Friday night?
A. Her ecological footprint was small in the natural environment and high in the manmade environment. B. Her ecological footprint was large in the natural environment (because she was the only human) and small in the man-made environment (because there are lots of humans). C. Her ecological footprint was the same in both environments because ecological footprints are only calculated over long (at least a year) periods of time for entire human populations. D. More information is needed about what resources the student used in both environments to determine her ecological footprint.
Asymmetry, choanocytes, filter feeding, osculum, and spicules are all terms associated with which
phylum?
a. Nematoda b. Ctenophora c. Nemertea d. Porifera e. Cnidaria
. Describe the enzymatic digestion that takes place in each structure of the digestive tract
What will be an ideal response?
Give the sex-chromosome constitution (X and Y chromosomes) and possible genotypes of offspring resulting from a cross between a white-eyed female (Xw XwY) and a wild-type male (normal chromosome complement) in Drosophila melanogaster
Include all zygotic combinations whether viable or unviable.