Where does the lymphatic system empty into the cardiovascular system?
A. the thoracic and right lymphatic duct
B. inguinal and axillary lymph nodes
C. the tonsils and thymus
D. axillary lymph nodes and the spleen
E. the thymus and spleen
Answer: A
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The function of the collar cells of sponges function is to:
a. secrete a matrix that supports the body of the sponge b. filter and engulf food c. digest food d. produce eggs and sperm e. attach the sponge to a solid surface
The term “plankton”
a. refers to a taxonomic division of algae. b. is a common term for unicellular organisms that drift or swim weakly in water. c. includes only multicellular forms. d. refers to small aquatic plants. e. would apply to large brown algae.
Fertilizers increase plant growth by providing:
What will be an ideal response?
A(n) ________ is an example of a chordate that is not a vertebrate
A) lancelet B) echinoderm C) bird D) fish