Near the ground, where ozone levels are naturally low, ozone is considered:
a. a neutral gas
b. a normal component of air
c. a pollutant
d. on its way to the ozone layer
e. beneficial for blocking UV radiation
c
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Charles Darwin formulated an explanation of ________ based on early marine observations aboard the HMS Beagle. a. None of these choices
b. the process of evolution c. atoll development d. both atoll development and the process of evolution
Answer the following statements true (T) or false (F)
1. Prokaryotic cells reproduce by forming gametes that will unite in fertilization. 2. Because prokaryotic cells do not go through interphase, mitosis, and cytokinesis, they do not replicate their DNA prior to division. 3. In spermatogenesis there are two divisions in meiosis, resulting in four daughter cells. 4. The number of chromosomes in a daughter cell produced by mitosis is the same as the number of chromosomes in the parent cell. 5. The number of chromosomes in a daughter cell produced by meiosis is the same as the number of chromosomes in the parent cell.
Obese people have a greater risk of four of the following. Which one is the exception?
a. type 1 diabetes b. colon cancer c. high blood pressure d. breast cancer e. heart disease
Overall, water movement from the soil, through plant tissues, and finally to the atmosphere through transpiration, is driven by a gradient of
A) water potential. B) osmotic pressure. C) water temperature. D) specific leaf area.