What were the major disadvantages of our early ancestors becoming bipedal?
A. Decrease in speed and mobility.
B. Lower back problems developed.
C. Increased predation by faster predators.
D. Decreased protection of the abdominal region.
Answer: B
You might also like to view...
__________occurs when two species act as agents of
selection upon one another. Fill in the blank(s) with the appropriate word(s).
N-CAM mediates interactions between neural cells and is a member of which of the following protein families?
A) catenins B) cadherins C) selectins D) immunoglobulin superfamily (IgSF) proteins E) lectins
How do protostomes differ from deuterostomes?
a. Protostomes are diploblastic. b. Protostomes have radial symmetry. c. Protostomes undergo spiral cleavage during development. d. The first opening that develops in protostomes is the anus. e. Protostomes undergo indeterminate cleavage during development
A balance between which two ions in aqueous solutions within organisms is critical for the proper functioning of the chemical processes of life?
A) H+ and OH? B) Na+ and Cl? C) Na+ and OH? D) H+ and Cl? E) H+ and H?