Answer:
Eutrophication is what happens when nutrient levels become too concentrated in rivers, lakes, and oceans. Eutrophication is when the levels of nutrients and minerals in a body of water become too concentrated. It is usually induced by the release of nitrate or phosphate-containing substances into a water body.
Explanation:
Answer:
The correct answer is option D- Small population.
Explanation:
Genetic drift is a random process which changes the allele frequency of a population in a short period of time. This change in allele frequency causes evolution and the allele frequency change can either decrease or increase over time.
This process is generally affected by the population size as a small population will have large sampling error which will have the strongest changes in allele frequency and alleles will have a greater chance of loss.
Thus, option D- Small population is the correct answer.
Answer:
Homozygous recessive individual
Explanation:
A testcross is a cross performed to test the genotype of an organism. The test cross is performed when the nature of the phenotype that is if the phenotype is dominant or recessive is known.
We know that a recessive trait is the result of the homozygous condition or phenotype is expressed when the genotype has two recessive alleles. But the genotype of the dominant trait could be determined when the genotype has either both the dominant alleles (homozygous dominant) or the either one of them is dominant allele (heterozygous condition).
So to determine if the dominant phenotype is determined by homozygous genotype or the heterozygous genotype, testcross is performed between the homozygous recessive genotype and the unknown dominant phenotype organism.
Thus, Homozygous recessive individual is the correct answer.
