Question

17 multiple choice 1 point the best explanation of darwinian fitness is: ability to adapt to environmental stresses physical size and strength ability to survive and reproduce ability to utilize resources 18 multiple choice 1 point the primary pressure on species to change over time is defined as: adaptation predation mutation natural selection 19 multiple choice 1 point which of the following occurrences does darwins origin of species purport to explain? mass extinctions that occurred due to noahs flood the emergence of modern species from a single common ancestor the molecular mechanisms that allow for adaptation the emergence of life from non - living, organic precursor materials 20 multiple choice 1 point evidence used to support the theory of evolution fall into which major categories? fossil record, homologous structures, biogeography, and molecular biology fossil record, homologous structures, astrobiology, and geophysics d. fossil record, analogous structures, biogeography, and molecular biology fossil record, homologous structures, biogeography, and astrobiology

Explanation:

• Question 17: Darwinian "fitness" is about reproductive success. Those who can survive and reproduce pass on genes.
• Question 18: Natural selection is the process where organisms better adapted to environment survive and reproduce.
• Question 19: Darwin's work focuses on species evolving from a common ancestor.
• Question 20: Fossil record (shows past life), homologous structures (similar anatomy), biogeography (species distribution), molecular biology (DNA/protein similarities) support evolution.

Answer:

1. Ability to survive and reproduce
2. natural selection
3. The emergence of modern species from a single common ancestor
4. fossil record, homologous structures, biogeography, and molecular biology