Say whether each method is in situ or ex situ…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Say whether each method is in situ or ex situ.
- Eggs and sperm of a threatened antelope are stored in liquid nitrogen.
- A hill forest in Meghalaya is protected as a sacred grove.
- Seeds of wild rice are dried and kept in a cold store.
- A wildlife sanctuary protects a river dolphin in its river.
- A botanical garden grows a rare orchid in a glass house.
- A threatened tree is multiplied by tissue culture in a laboratory.
Need a reminder? The key ideaShow
Ex situ conservation keeps a species off site: zoos, botanical gardens, seed banks, cryopreserved gametes. The Red Data Book of the IUCN lists threatened species. The Red List categories from the highest risk are Extinct, Extinct in the Wild, Critically Endangered, Endangered, Vulnerable, Near Threatened and Least Concern. A model seed bank loses viability as (not in the NEET syllabus).
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Ex situ. Cryopreservation of gametes.
Step 2. (b) In situ.
Step 3. (c) Ex situ. A seed bank.
Step 4. (d) In situ.
Step 5. (e) Ex situ.
Step 6. (f) Ex situ.
Answer: (a) ex situ; (b) in situ; (c) ex situ; (d) in situ; (e) ex situ; (f) ex situ.
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