In a species of desert lizard, only females are known to exist. When two females court prior to reproduction, it is necessary for one lizard to assume the posture of a male to stimulate the other female to ovulate. This is a case of
A. bisexuality.
B. hermaphroditism.
C. angiogenesis.
D. parthenogenesis.
Answer: D
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Bread making requires yeast, flour and water. Why is yeast used?
A. It makes the bread healthier as yeast is a source of vitamins. B. It makes the bread rise due to the carbon dioxide released during ethanol fermentation. C. It makes the bread rise due to the carbon dioxide released during cellular respiration. D. It makes the bread sour due to lactic acid fermentation. E. It makes the bread crunchy.
A restriction enzyme is a ____
a. viral enzyme that randomly cuts DNA b. DNA ligase enhancer c. bacterial enzyme that cuts DNA at specific sites d. single-stranded RNA molecule e. bacterial enzyme that functions in DNA replication
The loss of an electron by a molecule is called ____________________
Fill in the blank(s) with the appropriate word(s).
In last week's lab we performed an experiment to see whether or not termites orient to the lines of black ink pens. In this experiment, _____ was the dependent variable and _____ was the independent variable.
A. Orientation of termites, presence of ink B. Time termites spend on side A, number of termites C. Presence of ink, orientation of termites D. Presence of ink, time termites spend on side A E. Time termites spent on side A, presence of ink