Identify and briefly describe three biogeographical realms as described by Wallace. What will be an ideal response?
Nearctic and Palearctic realms: mainly North America (Nearctic) and Eurasia (Palearctic).
Contain plants and animals adapted to cold climates.
Neotropical realm: Central and South America; opossum, armadillo and porcupine are
unique to this realm.
Ethopian realm: most of Africa; contains the most varied vertebrates of all realms.
Oriental realm: parts of India and Southeast Asia; contains the fewest endemic species of all
the tropical realms
Australian realm: Australia and New Guinea; no native placental mammals, but marsupials
and monotremes predominate.
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Prokaryotic cells lack
a. DNA. b. a true nucleus. c. a cell wall. d. none of the above.
An x-shaped appearance of chromosomes during the process of meiosis provides evidence of
a. irradiation damage. b. crossing over. c. chromosomal aberration. d. fertilization. e. spindle fiber formation.
Phenotypic characteristics that have a continuous distribution are considered to be ________ traits
Fill in the blank(s) with correct word
If you cross two pea plants, one with green peas and the other with yellow peas, you find all of the offspring have yellow peas. You conclude Select one:
a. yellow is incompletely dominant over green. b. yellow is dominant over green. c. green is dominant over yellow. d. yellow and green are co-dominant. e. color is random in pea plants.