A porpoise and a dolphin, both mammals, mate and produce an embryo, but the embryo fails to
complete development. This event describes:a.
gestational abortion.
b. hybrid inviability.
c. hybrid breakdown.
d. temporal isolation.
e. hybrid sterility.
B
You might also like to view...
Water is gained through which of the following?
A. All of the options are correct. B. eating food C. drinking water that has a lower solute concentration than the body fluids D. cellular respiration E. osmosis across the gills of freshwater fish
In negative feedback, the variable being regulated is changed in the _______ direction, while in positive feedback the variable is changed in the ________ direction.
A. same, opposite B. decreasing, increasing C. negative, positive D. inhibitory, stimulatory E. opposite, same
Which of the following generally causes stomata to close?
a. release of abscisic acid by the roots b. a drop in CO2 concentration in leaf air spaces c. exposure to red light d. a drop in O2 concentration in leaf air spaces e. an increase in water in the soil
The following graph represents the concentration of cyclins over the course of the cell cycle. Which of the following statements is TRUE regarding the phase of the cell cycle where the red arrow is pointing? 
McGraw-Hill Education
A. At this point in the cell cycle, chromosomes have properly aligned on the metaphase plate and are beginning to separate. B. At this point in the cell cycle, the cell is determining if conditions are favorable for cell division. C. At this point in the cell cycle, DNA has already been replicated correctly. D. At this point in the cycle the cell is continuing to grow and make abundant tubulin proteins. E. At this point in the cell cycle, all sister chromatids are fully formed.