Of the following anatomical structures, which is homologous to the bones in the wing of a bird?
A. bony rays in the tail fin of a flying fish
B. chitinous struts in the wing of a butterfly
C. bones in the hind limb of a kangaroo
D. bones in the flipper of a whale
E. cartilage in the dorsal fin of a shark
D. bones in the flipper of a whale
You might also like to view...
Marc Spehr and his colleagues demonstrated which of the following?
a. Sperm cannot detect and swim toward attractant molecules. b. Sperm attraction can be stimulated by chemicals. c. Eggs release chemicals that attract sperm. d. Sperm can detect and swim toward attractant molecules, and sperm attraction can be inhibited by chemicals. e. Sperm can release chemicals that kill other sperm
Gases diffuse down a ____ gradient
a. volume b. temperature c. osmotic d. partial pressure e. chemical
The human has __________ sets of autosomal chromosomes. Fill in the blank(s) with the appropriate word(s)
Which of these characteristics is shared by algae and seed plants?
a) chloroplasts b) roots and shoots c) pollen d) embryo development within gametangia e) vascular tissue