A membrane permeable only to water separates two compartments filled with distilled water. Solute is added to one compartment. Osmotic pressure ________
a. all of the choices
b. causes the solute to move into the other compartment
c. is equal to the amount of force that would need to be applied to that compartment to keep the volume from increasing
d. decreases as more solute is added
c
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The waxy polymer on the leaves of vascular plants that protects them from pathogens is called
A. lignin. B. cutin. C. chitin. D. cellulose. E. sporopollenin.
Tubular secretion is essential for ____ homeostasis
a. pH b. water c. solute d. temperature e. sugar
Small interfering RNAs can alter gene expression by targeting mRNA for destruction or by blocking translation of a mRNA.
Answer the following statement true (T) or false (F)
The lymphatic system differs from the bloodstream in that
A) the bloodstream is a one-direction system. B) the lymph is moved via the help of a pump that pushes the fluid through the vessels. C) the lymph system is a multi-directional system with vessels concentrated at the "dead-end" areas of the hands, feet, and breast. D) lymph flow is dependent on muscle movement.