Pheromones are
A. chemicals.
B. used to communicate.
C. specific to each species.
D. All of these answers are true.
D. All of these answers are true.
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Dead phagocytes make up much of the material of pus
Indicate whether the statement is true or false.
Which of the following human viruses causes
warts?
a. papillomavirus b. rubella virus c. adenovirus d. Ebola virus e. herpes virus
Answer the following statements true (T) or false (F)
1.The pyloric sphincter lies between the small intestine and large intestine, thereby controlling the movement of food into the large intestine. 2.The lining of both the stomach and small intestine is protected from digestive enzymes by a mucus secretion. 3.Acid reflux, or "heartburn," is caused when the gastric juice moves back into the esophagus through the pyloric sphincter. 4.The trace mineral iron is necessary in humans for the transport of oxygen by hemoglobin molecules. 5.If the side effect of a drug was to disrupt homeostasis of vitamin C, leading to its premature breakdown and insufficient concentration, scurvy could result.
What is the major force that drives a growing root through the soil?
a) cell elongation from the tip of the root cap b) cell Phylum in the root meristem c) cell elongation behind the root meristem d) differentiation of xylem cells in the root meristem e) branch root formation