About half of all flowering plant species, including many important crop plants, are ____
a. polyploids
b. haploids
c. aneuploids
d. monoploids
e. diploids
ANSWER: a
You might also like to view...
How do modified and unmodified histone subunits become distributed among nucleosomes after replication?
A. The newly synthesized DNA strand contains unmodified histone subunits, while the old strand retains the modified histones. B. Both strands of DNA are repopulated first with a mixture of modified and unmodified H2A histones, followed by mixtures of H2B, H3, and, finally, H4. C. Both strands of DNA are repopulated first with a mixture of modified and unmodified H2A and H2B histones, followed by mixtures of H3 and finally mixtures of H4. D. Both strands of DNA retain H3-H4 modified pairs, and then are repopulated with unmodified H3-H4 pairs, followed by modified and unmodified H2A-H2B. E. Both strands of DNA retain H2A-H2B modified pairs, and are then repopulated with unmodified H2A-H2B pairs and then mixtures of modified and unmodified H3-H4 pairs.
Most of the oxygen in the blood is transported by
a. plasma. b. serum. c. platelets. d. hemoglobin. e. leukocytes.
The presence of which combination of molecules would lead to active transcription of an operon?
A) activator + corepressor B) activator + repressor C) inducer + corepressor D) repressor + corepressor E) activator + inducer
What cavities develop from the ventral cavity?
A. thoracic, abdominal, and pelvic B. cranial and thoracic C. pelvic and abdominal D. cranial and vertebral E. cranial, vertebral, and thoracic