Lamellipodia are formed by:
A. the contraction of myosin and actin.
B. the polymerization of actin microfilaments.
C. the polymerization of microtubules.
D. the disassembly of intermediate filaments.
B
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Gene technology has made it possible for bacteria to express human genes. Why is this possible?
The energy expenditure of a mammal at rest, in the postabsorptive state, and at a standard temperature is referred to as its
A. basal metabolic rate. B. standardized metabolic rate. C. baseline metabolic rate. D. activated metabolic rate. E. total metabolic rate.
Cell theory is one of the foundations of biology. What are the tenets of the cell theory? Check all that apply.A) All organisms are made up of more than one cell.B) All cells have the ability to move.C) Cells carry genetic material passed to daughter cells during cellular division.D) Cells arise from other cells through the process of cell division.E) Organisms are formed through spontaneous generation.F) All living organisms consist of cells.
What will be an ideal response?
Gene flow through migration ________
A) has no effect on allele frequencies of populations B) can go only in one direction C) may have the largest impact on small populations, such as those on islands D) maintains the Hardy-Weinberg equilibrium