Who developed the biological species concept and recognized that speciation depends on isolation and genetic divergence acting on a pair of populations?
a. Ernst Mayr
b. Charles Darwin
c. Robert Hooke
d. Bruce Byers
e. Watson and Crick
Ans: a. Ernst Mayr
You might also like to view...
____ _____ of animals enabled them to function in so many ways that they have been able to diversify in ways that plants, fungi, algae, and protozoans have not
A. Organ systems B. Radial symmetry C. Bilateral symmetry D. Phylogenetic analysis
In humans, spermatogenesis differs from oogenesis in that spermatogenesis ____
a. involves meiosis while oogenesis involves mitosis b. begins at birth while oogenesis begins at puberty c. has unequal cytoplasmic divisions, while oogenesis does not d. produces somatic cells while oogenesis produces gametes e. produces four functional gametes while oogenesis produces one functional gamete
Place the processes occurring in the digestive tract in the correct order.
I-Peristaltic waves of contraction propel the food along the esophagus. II-Gastric juices are secreted with the arrival of food into the duodenum. III-The acidic chyme is transferred through the pyloric sphincter. IV-HCl and pepsin begin digestion of proteins into shorter polypeptides. A. II, IV, and III B. IV, III, and II C. II, III, and IV D. I, II, and IV E. I, II, and III
Worldwide declines in the population size of frogs have recently been linked to ____
a. overharvesting b. a fungus c. dams d. decreases in global temperatures e. increases in precipitation