Which organisms represent the common ancestor of all photosynthetic plastids found in eukaryotes?

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#Question id: 343

#Unit 1. Molecules and their Interaction Relevant to Biology

Assume that acid rain has lowered the pH of a particular lake to pH 5.0. What is the hydroxide ion concentration of this lake?

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#Question id: 12645

#Unit 6. System Physiology – Plant

Classes of secondary metabolites, have strong antimicrobial activity have been proposed to function as defenses against pathogens in the intact plant these are_____X_______,  a group of triterpenes thought to disrupt fungal membranes by binding to sterols

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#Question id: 7481

#General Aptitude

What is the angle between minute hand & hour hand of a clock, when the time is 11:58?

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#Question id: 12146

#Unit 10. Ecological Principles

Which of the following is not a density-dependent factor? 

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#Question id: 3543

#Unit 8. Inheritance Biology

Mendel crossed round and tall pea plants (RRTT) with wrinkle and dwarf ones (rrtt). The F1 plants were all round tall. These F1 plants were cross with rrTt. Which of the following is correct among these offspring?