Blog

During prophase I of meiosis, homologous chromosomes pair up and form a synapsis. Then, a process occurs where sections of the maternal and paternal chromatids are exchanged. What is this process called, and why is it important?

All living organisms on Earth are classified into three major groups based on their cellular characteristics. What are these three domains of life?

Gold is a valuable metal that cannot be broken down into simpler substances by ordinary chemical means. What is the correct term for a substance like gold?

Water is often referred to as the “universal solvent” because of its ability to dissolve many different substances, such as salt and sugar. This property is due to water’s molecular polarity. Why does water’s polarity allow it to dissolve so many substances?

A biologist discovers a new single-celled organism in a pond. To confirm it is a living organism, which of the following characteristics must it exhibit?

A pedigree chart shows a genetic disorder that is X-linked recessive. The mother is a carrier, and the father is not affected. What is the probability that their son will be affected with the disorder?

A person has one allele for a widow’s peak (W) and one allele for a straight hairline (w). The person has a widow’s peak. What is true about these alleles?

In the process of glycolysis, glucose is broken down, and a small amount of ATP is produced. The ATP is then used to power other reactions in the cell. What is the role of ATP in this process?

For centuries, people believed that living things could arise from non-living matter. For example, it was thought that maggots spontaneously appeared in rotting meat. What is the correct term for this now-disproven idea?

Carbon-14 is a radioactive isotope of carbon used in carbon dating. The number 14 refers to the total number of protons and neutrons in the atom’s nucleus. Given that the atomic number of carbon is 6, how many neutrons does carbon-14 have?