In humans, the number of genes that are imprinted is less than 1%. These imprinted genes are usually associated with ________
A) DNA replication
B) apoptosis
C) brain function
D) metabolic pathways
E) growth regulation
Answer: E
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When the cell wall is removed from a Gram-negative bacterium without removing the outer membrane, the resulting form is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is a consequence of human population growth?
a. reduction in life expectancy b. increased density-dependent growth factors c. degradation of the natural environment d. reduced urbanization
In a cell-mediated immune response, how does a helper T cell activate cytotoxic T cells?
a. antibodies b. cytokine signaling c. receptor signaling d. via cross-talk with macrophages e. neural signaling
Members of what domain are evolutionarily closest
to eukaryotes? a. Animalia b. Protista c. Fungi d. Bacteria e. Archaea