You decide to plant a garden in your backyard. You dig up a strip of grass in a sunny spot. When you have finished digging up the grass, but you haven't planted anything, you have created a/an ______________ in the lawn
A. ecological disturbance
B. new community
C. Both responses are correct.
D. None of the responses are correct.
A
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Which of the following correctly describes bases that pair with each other in the DNA double helix?
A. Adenine bonds with guanine. B. Guanine bonds with thymine. C. Thymine bonds with cytosine. D. Cytosine bonds with guanine E. Guanine bonds with thymine.
The exchange of chromosome parts may occur during
A. telophase II. B. anaphase II. C. prophase I. D. metaphase II.
The chloride ion has an extra electron relative to the number of protons in its nucleus. Thus, chloride:
A) can bind to a cation B) has a negative charge and can bind a cation C) has a negative charge D) has lost an electron
Why are nearly all AIDS patients at risk of developing Pneumocystis pneumonia?
A) Pneumocystis jiroveci is becoming a wide-spread contaminant in health care environments. B) Pneumocystis jiroveci is commonly found in a wide variety of soils. C) The pathogen is easily transmitted from infected persons to others. D) Pneumocystis jiroveci is a common member of the respiratory microbiome in humans and opportunistic pathogen. E) Pneumocystis jiroveci is zoonotic in a wide range of vertebrates and exposure is unavoidable.