24. Darwin's finches are a group of seed-eating bird species found on the Galápagos Islands. Nest flies are a type of insect that has become a threat to the finches. The
diagram shows the life cycle of the nest fly.
Life Cycle of
Nest Flies
Adults lay eggs
in bird nests.
Larvae hatch.
Adults feed
on fruit.
Larvae attach
to young birds
to feed.
Adults hatch
from pupae.
Larvae drop to
bottom of nests
to form pupae.
Based on the life-cycle information, which statement best describes the relationship
between the nest fly larvae and the young birds?

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.