Which of the following most closely represents the male gametophyte of seed-bearing plants? 

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#Question id: 21258

#Unit 12. Applied Biology

Some classes of mutants were obtained from the parental strain as the source of genetic material for transduction:

I) A strain that are resistance to thialysine

II) A strain in which both the threonine-regulated AK and HD were resistant to feedback inhibition by threonine

III) A strain is selected for ß-hydroxynorvaline Sensitive, in which HDI was sensitive to both inhibition and repression and the threonine-regulated AK was constitutively synthesized 

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#Question id: 8913

#Unit 9. Diversity of Life Forms

The larvae of some insects are merely small versions of the adult, whereas the larvae of other insects look completely different from adults, eat different foods, and may live in different habitats. Which of the following most directly favors the evolution of the latter, more radical, kind of metamorphosis?

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#Question id: 2420

#Unit 2. Cellular Organization

Which of the following proteins promotes actin assembly and is involved in signaling pathways controlling actin assembly at the plasma membrane?

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#Question id: 11256

#Unit 10. Ecological Principles

Inferences built on the idea that evolutionarily older and younger characters should be found among close relatives if they are linked by evolution has been elaborated into a branch of evolutionary biology known as __________.

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#Question id: 3016

#Unit 2. Cellular Organization

Prokaryotic cells divide by a process known as