100 POINT AND BRAINLIEST Which gas is used in the rebreather to allow divers to stay underwater longer and dive deeper?
Hydrogen
Flourine
Helium
Francium

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

Classify the structures as homologous or analogous, depending on their structure and function.

The first generation of offspring from the cross of two parents is called the a. f1 generation b. f2 generation c. short generation d. p generation