In a cross between a petite yeast mutant and a wild-type strain, results showed some petite and some wild-type outcomes. Which of these statements must be true of this petite mutation?
A) It is suppressive.
B) It is a nuclear or segregational mutation.
C) It is a neutral mitochondrial mutation.
D) It replicates faster than wild type.
E) It has small deletions of mitochondrial DNA.
B
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Four of the five choices listed below are muscles
Select the exception. a. pectoralis b. patella c. gastrocnemius d. deltoid e. sartorius
Harmless king snakes mimic the color patterns of venomous coral snakes, which serve as models
If avoidance were based solely on prior predator experience with the model, what do you predict would happen in areas where coral snakes were never present? A) No predictions can be made based on the information given. B) Predators would initially attack and eat king snakes but soon learn to avoid them. C) Predators would avoid king snakes. D) Predators would initially avoid king snakes but soon learn to attack and eat them. E) Predators would attack and eat king snakes.
An organism that grows both in the presence and the absence of oxygen and uses oxygen when it is available is called a(n)________
Fill in the blank(s) with the appropriate word(s).
Which of these would be considered a transgenic organism?
a. a houseplant propagated from the cuttings of another houseplant b. a fern grown in cell culture from a single fern root cell c. a rat with rabbit hemoglobin genes d. a bacterium that has been treated with a compound that affects the expression of many of its genes e. a human treated with insulin produced by E. coli bacteria