A karyotype is a technique by which a researcher can see and count chromosomes
A. true
B. false
A
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Approximately 65.5 million years ago the Earth experienced a permanent loss of major groups of organisms during an event called ________
a. speciation b. continental drift c. genetic equilibrium d. mass extinction e. directional selection
Habitat fragmentation is harmful because no species are adapted to living along habitat edges
Indicate whether the statement is true or false
Most conifers have separate male and female reproductive parts on the same tree. This condition is referred to as:
a. deciduous. b. dioecious. c. monoecious. d. homosporous. e. heterosporous
Patients who alternate between mania and depression:
A) are referred to as bipolar. B) present with a flat affect. C) have multiple personalities. D) have a history of schizophrenia.