Refer to Figure 51-3. The chorion is identified by number:Refer to Figure 51-3. The chorion is identified by number:
a.
1.
b. 2.
c. 3.
d. 4.
e. 5.
C
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The latitudinal diversity gradient refers to what pattern of species diversity?
A. For many kinds of organisms, species diversity is greatest near the equator and lowest near the poles. B. For many kinds of organisms, species diversity is greatest near the poles and lowest near the equator. C. For many kinds of organisms, species diversity is greatest at low elevation and lowest at high elevation. D. For many kinds of organisms, species diversity is greatest at high elevation and lowest at low elevation. E. Plants are most diverse near the equator while animals are most diverse toward the poles.
The figure shows a cladogram of direct development versus development of a larval stage. Choose the true statements about the evolution of development in limpets.
_____ Loss of structures in the transition from a larval stage to direct development prohibits evolutionary reversal.
_____ Direct development has evolved multiple times.
_____ Evolution always proceeds parsimoniously.
_____ Possession of a larval stage is the ancestral state in limpets.
Which feature is found in sponges that classify them as animals? a. Organs b. Symmetry c. None of these features are found in sponges
d. Heterotrophs e. Tissues
Analysis of DNA sequences from two individuals of the same species results in a greater estimate of genetic variability than does analysis of amino acid sequences from the same individuals because...
A. different DNA sequences can code for the same amino acid B. Some amino acid variations cannot be detected b protein electrophoresis C. DNA sequencing is more reliable technique than protein electrophoresis D. proteins are more easily damaged than is DNA E. DNA is more heat-sensitive and therefore varies more