Honors Bio Review Guide: General Topics

Selective pressure in the context of tusklessness refers to:

• The environmental factors that favor tuskless elephants.

• The genetic mutation causing tusklessness.

• The increase in tusk size over generations.

• The natural habitat of elephants.

What is the purpose of gel electrophoresis in DNA profiling (CSI wildlife)?

• To separate DNA fragments by size

• To amplify DNA samples

• To sequence DNA

• To extract DNA from cells

Explain the process of seed dispersal in the elephant/environment context.

• Elephants eat fruits and disperse seeds through their dung.

• Elephants bury seeds in the ground.

• Elephants carry seeds on their backs.

• Elephants crush seeds with their feet.

Transpiration in plants is the process of:

• Photosynthesis

• Water absorption

• Water loss through leaves

• Nutrient uptake

Define natural selection in the context of tusklessness.

• Natural selection is the process by which individuals with advantageous traits survive and reproduce more successfully.

• Natural selection is the random occurrence of traits in a population.

• Natural selection is the deliberate breeding of individuals with desired traits.

• Natural selection is the process of individuals choosing their own traits.

What does heterozygous mean in DNA profiling?

• Having two identical alleles for a particular gene

• Having two different alleles for a particular gene

• Having more than two alleles for a particular gene

• Having no alleles for a particular gene

How is a census conducted in the context of elephants and the environment?

• By tracking their migration patterns

• By counting them from aerial surveys

• By using camera traps in their habitats

• By analyzing their DNA from samples

What are the stages and functions of mitosis in plants?

• Prophase, Metaphase, Anaphase, Telophase; functions include chromosome alignment, separation, and cell division

• Interphase, Prophase, Metaphase, Anaphase; functions include DNA replication and cell growth

• Prophase, Metaphase, Anaphase, Cytokinesis; functions include cell growth and DNA repair

• Interphase, Prophase, Anaphase, Telophase; functions include energy production and waste removal

What is poaching in the context of tusklessness?

• The illegal hunting of animals for their tusks, leading to a decrease in tuskless animals.

• The legal protection of animals to prevent tusklessness.

• The breeding of animals to increase tusklessness.

• The conservation efforts to increase the population of tusked animals.

Define homozygous in DNA profiling.

• Having two identical alleles for a particular gene

• Having two different alleles for a particular gene

• Having more than two alleles for a particular gene

• Having no alleles for a particular gene