Approximately how far back in time does the fossil record extend?

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#Question id: 5363

#Unit 8. Inheritance Biology

A Southern blot using a probe that binds to the region spanning the mutation causing albinism detects one DNA fragment in homozygous normal individuals (A/A) and two fragments in albino individuals (a/a). Following banding pattern of three offspring of parents? Which of the following correct regarding parents?

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#Question id: 16476

#Unit 12. Applied Biology

Which type of cultures can be used for cells which do not have cell to cell communication

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#Question id: 4805

#Unit 8. Inheritance Biology

What is maximum parental frequency for two genes if single cross over within two strands?

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#Question id: 735

#Unit 1. Molecules and their Interaction Relevant to Biology

The a-keratin chains indicated by the diagram below have undergone one chemical step. To alter the shape of the a-keratin chains—as in hair waving—what subsequent steps are required?

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#Question id: 24162

#General Aptitude

Black-and-white camera film, in the old days of film photography, was very sensitive to blue light but not to red light. Blue skies would often show very little detail, because the film couldn’t record all that it was seeing. To compensate, photographers would put a red filter on the lens, darkening the sky enough that the film could record its fluffy clouds.

This paragraph best supports the statement that