The strata of sedimentary rocks in the different regions of the world, have classified geologic history into eras;

Match the following;

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#Question id: 7295

#Unit 5. Developmental Biology

If a long-day plant has a critical night length of 9 hours, which 24-hour cycle would prevent flowering? (SS)

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#Question id: 14738

#Unit 4. Cell Communication and Cell Signaling

Choose correct statements about Muscarinic receptors;

a. An acetylcholine analog, In activated condition, these receptors slow the rate of heart muscle contraction.

b .This type of receptor is coupled to a Gαi protein, and ligand binding leads to the opening of an associated K+ channel.

c .The subsequent influx of K+ ions from the cytosol causes an increase in the magnitude of the usual inside-negative potential across the plasma membrane that lasts for several seconds. 

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#Question id: 11956

#Unit 7. System Physiology – Animal

An advantage of a complete digestive system over a gastrovascular cavity is that the complete system ________.

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#Question id: 19094

#Unit 4. Cell Communication and Cell Signaling

Hm1‐resistant maize plants produce an

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#Question id: 12707

#Unit 8. Inheritance Biology

AaBb=100% chance of crossing over between gene A and B than chance of  recombination?