The entrance of multiple sperm is called as

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#Question id: 19901

#Unit 12. Applied Biology

Which one of the following sensors is used to measure the movement of the nearby objects?

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#Question id: 15652

#Unit 13. Methods in Biology

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium. You have isolated a mutation that causes constitutive melibiase activity, which you designate MelA–. P1 phage mapping experiments using a Tn5 insertion linked to Mel1 show that MelA– is not linked to Mel1. Moreover you find that when an amber suppressor is introduced into a MelA– mutant, normal melibiase regulation is restored. Classify the MelA– mutation in terms of its basic genetic properties, 

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#Question id: 5635

#Unit 5. Developmental Biology

“speedy” sperm may have little chance of fertilizing the egg because

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#Question id: 29565

#Unit 6. System Physiology – Plant

Which of the following is not true regarding Necrotrophs

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#Question id: 28313

#Unit 5. Developmental Biology

During acrosome-reacted sperm pathway sperm that have undergone the acrosome reaction bind directly to which of the glycoprotein?