neneleey1941
18.02.2020 •
Biology
Individuals represented by the right end of the dose/response curve (responding to doses between 30 and 40 ppm) are to the chemical. Group of answer choices
a. very insensitive
b. very sensitive
c. relatively insensitive
d. average sensitivity
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Ответ:
Option A, very insensitive
Explanation:
A dose response curve measure the effect of a chemical or its toxicity based on the minimum concentration of a chemical that is sufficient to produce lethal effects and hence determine the safe threshold concentration. The unit of measurement is ppm and chemical toxicity is termed as LC50. The categories of toxicity and sensitivity are as follows
Below 10 ppm – extremely toxic & extremely sensitive
10 -100 ppm – highly toxic & highly sensitive
100- 1000 ppm – moderately toxic and sensitive
1000 – 10,000 ppm – slightly toxic and sensitive
10,000-100,000 ppm- Practically nontoxic and sensitive
More than 100,000 ppm - harmless.
Hence, option A is correct
Ответ:
The features that might affect how leaves process and perform rate of photosynthesis is determined by its surface area, chlorophyll and stomata.
The surface area of the leaf influences its performance to photosynthesis through the amount of light captured by it which is needed for photosynthesis to occur. As well chlorophyll which enables the leaf to absorb light and be processed. Lastly, stomata which is responsible for carbon dioxide and gas exchange.