Match the following items with the correct phrases.
_______1. Capable of producing antibody-secreting plasma cells after clone formation.
_______2. They help regulate the immune response by turning off certain activities.
_______3. Phagocytic cells that act as “antigen-presenting cells” in the immune response to (processing of) T-dependent antigens.
_______4. The major target of human immunodeficiency virus (HIV).
_______5. The only cells required in the immune response to T-independent antigens.
a. B lymphocytes (B cells)
b. macrophages
c. mast cells
d. TH lymphocytes (THcells)
e. TSlymphocytes (TScells)
1. a. B lymphocytes (B cells)
2. e. TSlymphocytes (TScells)
3. b. macrophages
4. d. TH lymphocytes (THcells)
5. a. B lymphocytes (B cells)
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The substance that typically provides rigidity to fungal cell walls, and is also found in the external skeletons of insects
and other arthropods, is called ____.
a. lignin b. cellulose c. starch d. collagen e. chitin
The functional units of the kidneys that are responsible for the formation of urine are called ________
Fill in the blank(s) with correct word
What are the two main processes upon which ecosystems depend?
A) speciation and evolution B) nutrient recycling and energy flow C) decomposition and nutrient recycling D) sunlight and photosynthesis
The internal structure of eukaryotic cilia and flagella are the same
Indicate whether the statement is true or false