Which disorder is characterized by mental deterioration and loss of bodily functions?
A) Parkinson's disease
B) Alzheimer's disease
C) attention deficit disorder (ADD)
D) depression
B
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You grow a culture of bacteria and split it into two culture tubes. One sample of bacteria you treat with calcium and the other is not treated. When you transform both samples with a plasmid, only the samples treated with calcium take up the plasmid. Which of the following best explains your results?
A. DNA is degraded in the absence of calcium. B. Calcium precipitates DNA, preventing it from being taken up by cells. C. The bacteria require calcium to grow. D. The calcium makes the bacterial membrane more porous to DNA. E. The bacteria use calcium as a source of energy to take up the DNA.
People in developed nations use enormous quantities of resources. Extracting and using these resources does irreparable harm to the planet. What are some things that individuals can do to reduce their impact on the planet and live sustainably?
What will be an ideal response?
At a plant’s light compensation point the rate of photosynthesis is greater than the rate of respiration
__________________ Indicate whether the statement is true or false.
Which protist group typically consists of amoeboid cells surrounded by a hard outer shell through which cytoplasmic
projections extend? a. rhizarians b. unikonts c. euglenoids d. archaeplastids e. opisthokonts