Answer:
Option). when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows.
Explanation:
In a negative feedback loop can be defined as a self-regulating system, in which the increased system output of prevents further production by the system.
For example, regulation of hormone glucagon. Glucagon is produced by pancreatic cells, when blood sugar level is too low. The glucagon raises level of blood sugar by producing glucose from glycogen and other complexes.
When cells detect increased level of sugar in blood, secretion of glucagon form pancreatic cells slows down and then stops to inhibit further release of hormone.
Thus, the correct answer is third option.
centromeres divide
is there options i could pick from?
Answer:
No
Explanation:
Nitrogen hepls in the formation of DNA cells
Answer;
Heterozygote advantage occurs when heterozygotes have a higher fitness than do both homozygotes. In frequency-dependant selection, the fitness of a phenotype declines it it becomes too common in the population.
Explanation;
The heterozygotes have both alleles, which is needed for genetic variation. Heterozygotes are essential for there to be genetic variation in a population. In other words it is when When a single copy of a disease allele doesn't result in a disease but instead is good for the person or organism that carries it, we say that allele has a heterozygote advantage. For example a sickle cell trait, which protects against malaria in heterozygotes, but causes a deadly disease in homozygotes.
-Frequency-dependent selection occurs when the fitness of a genotype depends on its frequency. It is possible for the fitness of a genotype to increase (positively frequency-dependent) or decrease (negatively frequency-dependent) as the genotype frequency in the population increases.