A radially symmetrical animal that has two embryonic tissue layers probably belongs to which phylum?

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#Question id: 10703

#SCPH06 I Botany

Keystone predators can maintain species diversity in a community if they

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#Question id: 4931

#SCPH06 I Botany

During course of evolution first prototroph was anoxygenic?

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#Question id: 2060

#I Life Science/ Life Sciences Group – I-V

An animal cell lacking carbohydrates on the external surface of its plasma membrane would likely be impaired in which function?

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#Question id: 3632

#SCPH28 | Zoology

geneticist is working with a new bacteriophage called phage Y3 that infects E. coli. He has isolated eight mutant phages that fail to produce plaques when grown on E. coli strain K. To determine whether these mutations occur at the same functional gene, he simultaneously infects E. coli K cells with paired combinations of the mutants and looks to see whether plaques are formed. He obtains the following results. (A plussign means that plaques were formed on E. coli K; a minussign means that no plaques were formed on E. coli K.)

How many cistron belong to these mutation?

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#Question id: 2296

#I Life Science/ Life Sciences Group – I-V

Small metabolites, such as sugar and ions, pass between plant cells via _______