Maintaining a steady-state internal environment, despite a changing external environment, is called ________.
A. heterostasis
B. homeostasis
C. biofeedback
D. bioregulation
Answer: B
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Mutants of Drosophila melanogaster have been used extensively to explore the genetic control of early development,x
particularly the hierarchical control of development, which means that genes expressed at each stage control the expression of genes that act later. A. true B. false
Which component of the PCR reaction is responsible for its specificity?
a. the pair of DNA primers b. the pair of RNA primers c. DNA polymerase d. the four nucleoside triphosphates e. the thermocycler
Similar body parts that reflect shared ancestry are called __________. Fill in the blank(s) with the appropriate word(s)
When this energy is reradiated as infrared radiation (heat), it is absorbed by these gases in the atmosphere.
A. greenhouse. B. refrigerants. C. isotopes of oxygen. D. isotopes of hydrogen.