________ are the adhesive glycoproteins associated with most animal cells that function in calcium-mediated cell-cell recognition and adhesion.
Fill in the blank(s) with the appropriate word(s).
Cadherins
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Which of the following adaptations would NOT increase the surface area of a respiratory surface?
a. skin folds on an amphibian b. a flatworm having a broad, flat body c. branched gill filaments d. internal folds within lungs e. endothermy
Which genotype would have an advantage if a recessive allele coded for a slightly different, functional protein?
Spherocytosis is a human blood disorder associated with a defective cytoskeletal protein in the red blood cells (RBCs). What do you suspect is the consequence of such a defect?
A) abnormally shaped RBCs B) an insufficient supply of ATP in the RBCs C) an insufficient supply of oxygen-transporting proteins in the RBCs D) adherence of RBCs to blood vessel walls, causing plaque formation
Mantled howler monkeys have been found to obtain most of their food from relatively rare trees, even though finding these trees takes much longer than finding common trees. Nutritional analyses of both rare and common trees found that the rare trees tended to be higher in protein and water, while the common trees tended to be higher in crude fiber and plant secondary compounds. What process would maintain this behavior in mantled howler monkey populations?
A. habituation B. imprinting C. natural selection D. sexual selection E. visual communication