Heterochromatic regions at the ends of chromosomes are
A) centromeres.
B) euchromatin.
C) telomeres.
D) DNA hubs.
C) telomeres.
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Members of the genus Rhizobium, when growing symbiotically within root nodule cells, are referred to as ________.
Fill in the blank(s) with the appropriate word(s).
The human ____________ consists of 33 vertebrae that are cushioned with cartilage disks and provide support and protection to the spinal cord.
A. pectoral gridle B. pelvic girdle C. scapula plate D. rib cage E. vertebral column
Which statement concerning cell division and cancer is incorrect?
A) Normal cells are limited in how many times they can divide. B) Cancerous cells can become immortal. C) Oncogenes protect against cancer. D) Apoptosis can be used to kill cancerous cells in the body.
A squirrel is born and raised in captivity. Once released into the wild, it immediately begins to bury nuts. This is an
example of: a. direct fitness. b. learning. c. innate behavior. d. learned behavior. e. habituation