Explain what is meant by species richness

A recessive allele is expressed if there is no dominant allele present. A) True B) False

Which of the following is not true of young drivers? A. They're more able to respond to traffic hazards quickly. B. They're more likely to underestimate the danger of a situation. C. They're more willing to take risks.

More than one million years ago, a single species of finch migrated to the Galapagos from the mainland of Central or South America. From this one migrant species at least thirteen species of finch would eventually evolve.

A chemical indicator called phenol red is typically used in microbiology labs. at ph 8, it appears fuchsia; at neutral, it appears red; and at ph 6, it is yellow.

What are some adoptations Darwin noticed in species of tortoises and on Golapogos island?

Mrs. smith presented to her physician's office for an office visit for an upper respiratory infection. the physician examines the patient and prescribes antibiotics. the physician notices the patient has a suspicious looking mole.

What is it called when changes occur in an ecosystem that already exists? * a. primary succession b. secondary succession c. pollution

Compare and contrast the processes of mitosis and meiosis.

What are the four (4) requirements for natural selection to occur?

Which of the following is NOT a source of genetic variation? A) random fertilization of eggs by sperm B) independent assortment of chromosomes C) crossover of homologous chromosomes D) age of either or both parents