Preserves animal tracks are called trace.
Answer:
salt is the correct answer
Answer: (It maintains an ecosystem)
Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. For example, A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms.
Explanation:
Answer:
(of a cell or nucleus) having a single set of unpaired chromosomes.
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