Question

Orthodox seeds are those,
A. Which resist the change in temperature and pressure
B. Which cannot resist the change in temperature and pressure
C. They have a long viability
D. Which are free permeable

Answer 1

Hint: The above-mentioned orthodox seeds are considered to be the oldest viable seed, but their survival time limit of the seeds is still unknown.

Complete answer:
During the ex-situ conservation, orthodox seeds are seeds that survive freezing or drying. As per the information from the U.S Department of Agriculture, there comes some variation in the ability of these seeds to withstand the drying and storage, with some seeds being over-sensitive than the others. Thus, some seeds are considered as the intermediate in their storage capability, whereas other seeds are fully orthodox in nature. Judean date palm is the one notable example of a long-lived orthodox seed which has survived the accidental storage followed by controlled germination. This is an almost 2000-years old case which successfully sprouted in 2005. This is also considered as the oldest viable seed whose survival time is still unknown. Orthodox seeds can be stored in the clean, airtight, dry containers. The seeds should be filled in the container such that the container becomes full and then immediately close it. If the seeds are properly dried, then they can also be stored at the room temperature.
Hence, the correct answer is Option (B).

Note: The major difference between the orthodox seeds and the recalcitrant seeds are that orthodox seeds can be stored confidentially, but not in the case of recalcitrant seeds. The recalcitrant seeds tolerate the loss of water but the orthodox seeds do not survive in the extreme level of water loss.