On the island of Madeira, two populations of house mice have accumulated different Robertsonian translocation. Which are true about these two populations of mice? (Select all that apply.)
A) They have fewer chromosomes than mice in other areas of the world.
B) They are isolated from each other geographically.
C) If mice from different populations mate, their offspring are sterile.
D) Mice from different populations are unable to mate with each other.
E) They are becoming extinct because of semi sterility.
A) They have fewer chromosomes than mice in other areas of the world.
B) They are isolated from each other geographically.
C) If mice from different populations mate, their offspring are sterile.
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The supersecondary structure (motif) most likely to contain a heptad (or leucine) repeat would be:
A. a Greek key. B. a ?-?-?. C. a helix-turn-helix. D. a coiled-coil. E. a four-helix bundle.
The region at which the RNA polymerase binds is the ________ region.
A. promoter B. trailer C. leader D. coding
Accessory pigments within chloroplasts are responsible for
a. driving the splitting of water molecules b. absorbing photons of different wavelengths of light c. providing electrons to the reaction center chlorophyll after electrons pass to NADP+ d. pumping H+create a proton gradient across the thylakoid membrane e. anchoring chlorophyll a within the reaction center
Answer the following questions true (T) or false (F)
1. Only eukaryotic cells have membrane-bound organelles. 2. It is estimated that there are more bacteria in your mouth than the number of people who have ever lived. 3. The typical animal cell is 25 micrometers in diameter.