People have cut down forests to clear land for crops, cattle, roads, and cities. these trees are also used for fuel, building material, and paper. the loss of forests have had the following effects (choose all that apply):

a. causes many species to lose their habitats and food sources, resulting in many becoming extinct or endangered.

b. creates erosion. the roots of plants hold soil in place to prevent erosion and absorb rainwater, preventing flooding.

c. creates pollution with the use of ddt, which is a fertilizer that impacts the health of many organisms in the area.

d. contributes to global warming. the abundant plant life in forests takes in carbon dioxide and stores the carbon as a source of energy. without forests, the carbon that would have been stored in the trees exists as carbon dioxide and contributes to global warming.

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

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays