Answer: Experiment - randomized block design
Explanation:
A randomized block design (RBD) is an experimental study where the scientist classifies subjects into different groups, denominated blocks. The subjects within each block are assigned to the different treatments, varieties of wheat in this example.
A randomized block design is effective when the subjects within blocks are comparable in how they influence the response variable but differ from other blocks.
Answer:
D. amphetamines became available from illegal laboratories rather than legitimate pharmacies
Explanation:
Due to the amendments to federal drug laws known as Drug Abuse Control Amendment of 1965, amphetamine became available from illegal laboratories rather than legitimate pharmacies. Prior to the amendment drugs like barbiturate, amphetamine and lysergic acid diethylamide (LSD) could easy be gotten from pharmacies but the amendment restricted the availability of such drugs. The amendment was as a result of increase in drug abuse among the American population.
If a country is not able to produce some goods, it has to buy them somewhere else and bring them into the country - this is called importing, so the correct answer is b.
Selling goods outside of the country is called exporting and giving them away would be called donating.
<span>Its an increase in agriculture production in the South.</span>
so that people can help and send things such as clothes food water and also so the government can see the damages and help rebuild that city state or country
