A man is standing on a railway bridge which is 180 m long. He finds that a train crosses the bridge in 20 seconds but himself in 8 seconds. Find the length of the train and its speed.

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#Question id: 19040

#Unit 13. Methods in Biology

In chromatography, which of the following can the mobile phase be made of?

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#Question id: 2241

#Unit 2. Cellular Organization

Which of the following statement(s) is (are) true of V-class proton pumps?

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#Question id: 11492

#Unit 2. Cellular Organization

Which of the following integral membrane protein transport chemotherapeutic drug out of the cell and prevents their accumulation within a tumor and thus blocks their therapeutic effects?

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#Question id: 28340

#Unit 5. Developmental Biology

Which of the following gene is specify the characteristic structures of each segment?

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#Question id: 28945

#Unit 7. System Physiology – Animal

Which of the following hormones is involved to promotes the mammary gland development and milk production?