Atoms have no electric charge because they have ________.
A) uncharged neutrons in their nuclei
B) an equal number of protons and neutrons
C) an equal number of protons and electrons
D) an equal number of charged and uncharged subatomic particles
Ans: C) an equal number of protons and electrons
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The time required to kill 90% of the microorganisms or spores in a sample at a specified temperature is the
A. thermal death point (TDP). B. decimal reduction time (D value). C. thermal death time (TDT). D. z value.
What characterizes terrestrial tetrapods?
A) Lives on land, has four limbs B) Lives on land, has four sets of chromosomes C) Lives on land, has four cranial nerves D) Lives in the water, has four limbs
Using biotechnology, plant breeders attempt to find and incorporate specific resistance genes into plants that lack them. Once a plant has been given a resistance gene, it will have indefinite protection from the associated pathogen.
Answer the following statement true (T) or false (F)
A trend first observed in the evolution of the earliest tetrapods was _____
A) the appearance of jaws B) feet with digits C) the mineralization of the endoskeleton D) the amniotic egg