Nearly all ________ are aquatic
A) crustaceans
B) arachnids
C) flatworms
D) roundworms
A
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Gap junctions ____
a. seal the spaces between cells b. allow ions and small molecules to pass between cells c. allow plant cells to communicate with each other d. give the cell its shape e. anchor the cell membrane to the cell wall
Which type of learning occurs during a genetically determined time period, early in life?
a. instinct b. imprinting c. conditioned learning d. habituation e. imitative learning
All of the following are examples of learning except
A. a wolf pack establishing a territory. B. a spider building a new web after the original was destroyed. C. ducklings following their mother. D. animals in zoos begging for food.
Which of the following statements regarding the lymphatic system is FALSE?
A) Lymph fluid is similar to blood plasma. B) The lymphatic vessels contract to move lymphatic fluid. C) The lymphatic vessels have valves to control the direction of fluid flow. D) The lymphatic system begins with highly permeable capillaries. E) Fluid flows through lymph nodes on its way to the bloodstream.