The wide adaptive radiation of mammals occurred during the early ____ era
a. Cenozoic
b. Paleozoic
c. Tertiary
d. Devonian
e. Jurassic
a
You might also like to view...
Which of the following statements about cell signaling is correct?
A. Signaling pathways and the molecules involved (e.g., kinases) evolved before the evolutionary split between plants and animals and thus are similar in the two groups. B. Molecular mechanisms for communication between cells occurs in complex multicellular organisms, but not single-celled eukaryotes. C. All animals have gap junctions to allow for targeted signaling between cells. D. Signaling molecules are generally polysaccharides that activate receptors on target cells and activate or repress gene expression. E. Only cells on the exterior surface of an organism have receptors to detect environmental signals.
Compare and contrast the function of the external epithelium and its derivatives in invertebrates and
vertebrates. What will be an ideal response?
Which of the following strategies has the potential to employ the most biodiversity?
A. terracing B. contour farming C. intercropping D. no-till farming E. low-input agriculture
Insects have ____.
A. simple eyes B. ocelli C. ciliary eyes D. compound eyes E. “camera” eyes