The insects were the first organisms to
a. show bilateral symmetry.
b. exhibit segmentation.
c. fly.
d. develop lungs.
d
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Disturbances to an ecosystem, such as fires and floods, are often seen as negative. Describe a situation where regular disturbances are not only beneficial but are also required to sustain the ecosystem
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Check all of the main functions of MADS box-containing genes in plants.
A. root development B. the transition from vegetative to reproductive growth C. generation of leaf form D. floral organ identity
Which of the following statements regarding blood pressure is false?
A) Normal blood pressure for adult humans is usually at or below 120/80. B) Hypertension is defined as persistent systolic pressure above 120 and/or diastolic above 80. C) High blood pressure can lead to an enlarged and weakened heart, increased risk of heart attack, stroke, and kidney failure. D) The higher number in a blood pressure reading measures the force of a heart contraction.