You are a substitute teacher in a high school biology lab class on the day the students are dissecting fetal pigs. One student finds that his pig's lungs, liver, pancreas, and digestive organs are either missing or small and malformed. The student
scratches his head with his clean hand and says, "What went on here?" Although there may be more than one reason, what might you propose as an explanation based on embryonic development?
What will be an ideal response?
It is possible that many of the endoderm cells of the embryo died or did not develop properly.
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Which of the following influence(s) the efficiency of an antimicrobial agent?
A. Duration of exposure B. Temperature C. Concentration of the agent D. All of the choices are correct.
The competitive exclusion principle assumes that the
A) competing species have different resource requirements. B) competing species have the same carrying capacity (K). C) environmental conditions remain constant. D) superior competing species will have a lower population growth rate than the inferior competitor.
The sugar that first bonds with carbon dioxide in the Calvin cycle is:
A) RuBP. B) G3P. C) rubisco. D) 3-PGA.
Which of the following is considered one of the guidelines for exercise training for asthmatics?
What will be an ideal response?