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tino4ka555 [31]
3 years ago
14

What protects the plant embryo?

Chemistry
1 answer:
Pani-rosa [81]3 years ago
5 0
How do seed plants protect their embryos?
Reptilian embryos are protected from desiccation by a leathery shell. Similarly, sporophytes of both gymnosperms and angiosperms protect embryos within, and they also protect male gametophytes against desiccation using .....
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You have collected a tissue specimen that you would like to preserve by freeze drying. To ensure the integrity of the specimen,
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The maximum pressure is 612.2 Pa

Explanation:

The pressure of the ice (P1) = 624 Pa

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The maximum temperature the specimen = - 5 oC

                                                                     = -5 + 273 = 268K

The maximum Pressure the freeze drying can be will be (P2) = ?

Using Pressure law, which shows the relationship between pressure and temperature.

                        P1 / T1 = P2 / T2

                       P2 T1 = P1 T2

                       P2 = P1 T2 / T1

                       P2 = 624 × 268 / 273.16

                       P2 = 612.2 Pa

The maximum pressure at which drying can be carried out is 612.2 Pa

Check the attached document more explanation.   jjjjggggg

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