Two particles are moving back and forth in a 10 m long tube. Particle ‘P’ is moving at a speed of 5m/s and particle ‘Q’ at a speed of 2 m/s. Consider that Both P and Q start at the same time in the same direction. How much times will ‘P’ cross ‘Q” by the time ‘Q’ reaches the end of the tube?

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#Question id: 5571

#Unit 5. Developmental Biology

Environmental cues that influence the timing of reproduction generally do so by ________.

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#Question id: 5572

#Unit 5. Developmental Biology

Females of many insect species, including honeybee queens, can store gametes shed by their mating partners in ________.

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#Question id: 5573

#Unit 5. Developmental Biology

Animals that have external fertilization are most likely to reproduce in which of the following areas?

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#Question id: 5574

#Unit 5. Developmental Biology

In close comparisons, external fertilization often yields more offspring than does internal fertilization. However, internal fertilization typically offers the advantage that ________.

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#Question id: 5575

#Unit 5. Developmental Biology

Which of the following is the correct sequence of the zones in the primary growth of a root, moving from the root cap inward?

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#Question id: 5576

#Unit 5. Developmental Biology

The polarity of a plant is established when ________.