What might be an unforeseen outcome of planting soybean plants at high densities in a field?
A) reduced seed production per plant
B) increased plant size
C) increased seed size
D) decreased plant mortality
A
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Recall that the age structure histogram (for humans) of India is shaped like a pyramid (Figure 46.8). What does this tell you about India's population?
A. It is shrinking. B. It is growing. C. It is relatively constant. D. It is currently shrinking, but will increase over the next few years. E. It is currently growing, but will decrease over the next few years.
The problem with defining abnormal behavior is that ____
a. too many disorders have similar phenotypes b. some behaviors are not abnormal, but simply variants c. biological factors related to abnormal behavior are not known d. mental illness is multifactorial, and therefore, cannot be defined e. twin concordance studies mental illness is due mostly to environmental components
The tools used by ecologists to study mortality rates were developed by developmental biologists
Indicate whether the statement is true or false.
In order to stain flagella so that they may be readily observed by light microscopy, it is usually necessary to increase their thickness.
Answer the following statement true (T) or false (F)