Some salamander species retain gills and other larval characteristics throughout adult life. This is an example of
A. phenotypic integration
B. neoteny
C. allometry
D. heterozygosity
E. canalization
Answer: B. neoteny
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Unicellular and simple multicellular organisms isolate and eliminate waste materials by:
A. moving the wastes into a contractile vacuole and eliminating them through exocytosis. B. filtering the wastes through specialized filters in the plasma membrane and into the extracellular space. C. secreting wastes into excretory tubules that connect to the outside of the cell. D. filtering the wastes into a collecting tubule and then selectively reabsorbing key solutes prior to excretion. E. All of the answer options are correct.
Answer the question using the accompanying figure. Which branch of this phylogenetic tree identifies Eukarya?
a. A b. B c. C d. D e. E
Which of the following are NOT components of the
appendicular skeleton? a. arm bones b. collarbones c. finger bones d. ribs e. leg bones
The process by which light energy is used by plants, algae, and cyanobacteria to form sugar is called ________
Fill in the blank(s) with correct word