JAMB Biology Past Questions & Answers - Page 14

In monohybrid inheritance, the inheritance of a single gene is considered. An organism that carries two different alleles for a particular gene is referred to as heterozygous. The alleles may have different versions or variations of the gene. Heterozygous individuals carry two different alleles, with one being dominant and the other recessive.

Fishes have a swim bladder or air bladder which helps them to remain buoyant without sinking in water. They are present in the body cavity.

The pancreas is an organ located in the abdomen, and it serves both digestive and endocrine functions. In terms of hormone production, the pancreas is responsible for producing insulin. Insulin plays a crucial role in regulating blood sugar levels by facilitating the uptake of glucose into cells.

The primary organ involved in gas exchange during respiration in humans is the lungs. The lungs are a pair of respiratory organs located in the chest cavity. They are responsible for the exchange of oxygen and carbon dioxide between the air and the bloodstream.

The term cell was given by Robert Hooke. The term cell was coined by Robert Hooke. Robert Hooke observed a honeycomb-like structure under the microscope while cutting a thin section of cork, hence he named the structure as a cell.