In later chapters, you will learn more about the regulation of gene expression. One way to regulate gene expression is to make changes to the histone proteins to alter how tightly the DNA is coiled and wrapped. The more tightly coiled and wrapped a particular region of DNA is, the less likely it is that the genes in that region will be expressed. Bearing this in mind, how tightly do you think regions of heterochromatin are compacted?
A. loosely
B. not at all
C. very tightly
D. moderately
Answer: C
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Where does glycolysis takes place?
A. mitochondrial matrix B. mitochondrial membrane C. mitochondrial inner membrane D. mitochondrial intermembrane space E. cytosol
Which statement is false?
a. Calcium is the most important mineral involved with bone tissue turnover. b. Osteoblasts and osteoclasts are involved with the reabsorption and repair of bones. c. Bone mass decreases with age. d. Males have greater problems with loss of bone tissue than females do. e. Marrow fills the cavities in the spaces of the spongy bone and in the center of the shaft of the bone almost as quickly as the spaces are formed.
________ is necessary for a population to survive over successive generations in response to environmental changes
A) Speciation B) Gene flow C) Adaptation D) Sexual selection
After examining the tree of life of all known living organisms depicted in the figure above, describe the rela-tionship of the Animal Kingdom to the rest of life on Earth
What will be an ideal response?