Question

16 multiple choice 1 point
ecologists are chiefly concerned with the ___ and ___ of living things in the environment.
ancestry, similarities
homology, niche
cells, molecules
distribution, population size and density
17 multiple choice 1 point
which of the following has not allowed the human population to expand the carrying capacity of the environment?
an increasing number of antibiotic - resistant bacterial strains
better agricultural and water purification technology
a better understanding of infectious disease
a better understanding of nutrition

Explanation:

1. Ecologists study the distribution, population size, and density of living things in the environment. Ancestry and similarities are more related to evolutionary biology. Homology (similarity in structure due to common ancestry) is also evolutionary, and niche is part of ecology but not the main focus here. Cells and molecules are studied in cell biology and biochemistry.
2. An increasing number of antibiotic - resistant bacterial strains is a problem that can limit human population growth (by causing more difficult - to - treat diseases) rather than expanding the carrying capacity. Better agricultural and water purification technology provides more food and clean water. A better understanding of infectious disease helps in preventing and treating diseases, allowing more people to survive. A better understanding of nutrition helps in maintaining health, which also contributes to population growth.

Answer:

1. distribution, population size and density
2. An increasing number of antibiotic - resistant bacterial strains