Scientists can gain information about ancient atmospheric CO2 levels through ice core data. This is primarily the result of sediments being trapped in glaciers, which scientists can subsequently assess for different carbon isotopes (13C, 12C, 14C)
A. true
B. false
B
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The elbow and knee are examples of ________ joints.
A. cartilaginous B. ball-and-socket C. fibrous D. synovial E. immovable
What type of microscopy allowed scientists to visualize the cytoskeleton in living cells?
A) transmission electron microscopy B) scanning electron microscopy C) fluorescence microscopy D) light microscopy
The plasma membrane is composed of phospholipids, which are free to move laterally, and is peppered with both stationary and mobile proteins. This view of the plasma membrane is known as the:
A) semipermeable membrane model. B) phospholipid bilayer model. C) fluid-mosaic model. D) peppered membrane model.
Which of the following correctly traces the pathway of urine flow in vertebrates?
a. Collecting tubule ureter bladder urethra b. Renal vein ureter bladder urethra c. Nephron urethra bladder ureter d. Cortex medulla bladder ureter e. Renal pelvis medulla bladder urethra