Which of the following pairs of structure are homologous?
_____ pectoral fin of a shark and front flipper of porpoise.
_____ wing of a dragonfly and wing of a hawk.
_____ wing of a bluejay and front flipper of a porpoise.
_____ forelimb of a dog and forelimb of a horse.
_____ wing of a dragonfly and forelimb of a flying squirrel.
_____ pectoral fin of a shark and front flipper of porpoise.
_____ wing of a dragonfly and wing of a hawk.
__X__ wing of a bluejay and front flipper of a porpoise.
__X__ forelimb of a dog and forelimb of a horse.
_____ wing of a dragonfly and forelimb of a flying squirrel.
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Which of the following focuses on vital
statistics that describe the population?
a. ecostatistics b. population ecology c. demographics d. biostatistics e. community ecology
Why are chromosomes more easily visible under the microscope during metaphase as compared to G2 phase?
What will be an ideal response?
The process of error correction of mismatched bases carried out by DNA polymerases is called ________
Fill in the blank(s) with correct word
Which way does the reaction H+ + HCO3- ? H2CO3 ? H2O + CO2 proceed in the lungs?
A. to the left B. to the right and then back to the left C. to the right D. This reaction does not proceed in the lungs. E. none of these