Stem cell research is important because __________.
A. it is aimed at treating the whole person—body and mind.
B. stem cells can be used to generate virtually any type of specialized cell in the human body.
C. it is essential to various types of preventive medical approaches.
D. it is the only area of research that does not involve controversies.
B. stem cells can be used to generate virtually, any type of specialized cell in the human body.
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Which of the following statements is a valid conclusion of this experiment?
A) Balanus can survive only in the lower intertidal zone because it is unable to resist desiccation. B) Balanus is inferior to Chthamalus in competing for space on rocks lower in the intertidal zone. C) The two species of barnacles do not compete with each other because they feed at different times of day. D) The removal of Balanus shows that the realized niche of Chthamalus is smaller than its fundamental niche. E) These two species of barnacle do not show competitive exclusion. F) If Chthamalus were removed, Balanus's fundamental niche would become larger.
Give an example of an acute and a chronic carrier of disease. What disease characteristics allow for chronic carriers to play significant roles in the spread of the disease? How are diseases with chronic carriers controlled?
What will be an ideal response?
The worst invasive species brought to Easter Island by the Polynesian settlers was __________.
Fill in the blank(s) with the appropriate word(s).
For a trait, dominant alleles mask
What will be an ideal response?