Toluene, ethylbenzene and xylene must be kept to ________levels in drinking and recreational waters due to their toxicity

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#Question id: 10341

#Unit 6. System Physiology – Plant

The accumulation of nitrate that results from diminished nitrate reductase activity, this symptoms is caused by

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#Question id: 1081

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a type of local signaling in which a cell secretes a signal molecule that affects neighboring cells?

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#Question id: 4741

#Unit 8. Inheritance Biology

The F2 progeny from a particular cross exhibit a modified dihybrid ratio of 9 : 7 (instead of 9 : 3 : 3 : 1). What phenotypic ratio would be expected from a testcross of the F1?

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#Question id: 10212

#Unit 6. System Physiology – Plant

Which of the following mechanism is not involve in phtoprotection to plants?

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#Question id: 9271

#Unit 6. System Physiology – Plant

Chlorophylls a and b are abundant in green plants, and c and d are found in some protists and cyanobacteria. A number of different types of bacteriochlorophyll have been found; which type of chlorophyll is the most widely distributed, shows the distribution of pigments in different types of photosynthetic organisms;