Which best describes the age structure of a population with zero population growth? 4
the majority of people are of prereproductive ages in a broad-base pyramid age structure diagram.

the age-structure diagram would be narrow at the bottom and top with a broader middle.

the age structure would be broad at the top in postreproductive ages and narrow downward in an inverted pyramid.

the age-structure diagram would be column-shaped with all age classes approximately equal.

Populations of blue-winged warblers, a type of bird, migrate south in the winter and return to canadian breeding grounds in the spring. as global temperatures have increased due to climate change, spring has started arriving in the warbler's breeding grounds earlier in the year, before the warblers return. warblers now arrive at their breeding grounds too late to select ideal nesting sites and to feed on important early-spring food sources how are populations of blue-winged warblers most likely to be affected by the earlier arrival of spring? o a. populations will go extinct since the warblers will stop migrating to breeding grounds. b. populations will be unaffected since most species can quickly adapt to effects of climate change. c. populations will increase since warmer temperatures are generally beneficial to survival, d. populations will decline since individuals will be less likely to successfully reproduce, reset next

Graphs you see question 5 options: the change in data over time the relationship between different dependent variables the relationship between the independent variable and the dependent variable/s the relationship between different independent variables

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome