Answer:
One
Explanation:
Sodium (Na) has one valence electron so it gets one dot.
Irrigation is an artificial technology that helps to obtain water and thus recover the loss in extensive (wheat) crops.
<h3>What is irrigation?</h3>
Irrigation is a technology based on the artificial supply of water to recover crops from drought conditions.
Genetic modification may also help with drought conditions by inserting into the genome of the target species gene sequences associated with hydric stress (e.g., a protein channel to close stomata at night).
In conclusion, irrigation is an artificial technology that helps to obtain water and thus recover the loss in extensive (wheat) crops.
Learn more about irrigation systems here:
brainly.com/question/1968843
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Answer:
Option-C
Explanation:
Hamilton gave the mathematical expression for the altruistic behaviour or trait in a population which suggested that the alleles for altruistic behaviour will be favoured by the natural selection if BR-C > 0.
The mathematical expression for the altruistic trait is rb> c
where r - relatedness, b- the benefit to recipient and itself also and c-cost to an actor.
In the given question, all the cases meet the condition of Hamilton's rule except one which is the In- law bee-eaters which raise the young near to the nest as the parents who can raise the young ones are not benefited personally from the action of the young as the young one treat them as non-kin. This does not fulfill the condition of the Hamiltons rule.
Thus, Option-C is correct.
