Descendant cells that are long-lived and "remember" a particular invader and mount a rapid intense response to it if it should reappear are ________
A) macrophages
B) memory cells
C) suppressor cells
D) helper cells
B
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________ in saliva cleaves glycosidic linkages in peptidoglycan present in bacterial cell walls, weakening the wall and causing cell lysis
A) Mucus B) Lysozyme C) Fibrin D) Lipid A
If a sieve tube in a plant becomes blocked, the plant
will experience difficulty in a. carrying on transpiration. b. transporting minerals. c. translocating food throughout the plant. d. completing cell division and experiencing normal growth. e. healing wounds.
Describe the components and functions of a homeostatic system and relate negative feedback. What will be an ideal response?
Which of the following conditions is necessary to maintain the Hardy-Weinberg equilibrium?
A. random mating B. gene flow C. genetic drift D. mutations E. sexual selection