19. when a catalyst is missing from a
chemical reaction, what happens to the
reaction?
o a. it can't occur because the rate of
reaction isn't regulated.
o b. it speeds up too much and the
reaction happens at the wrong time.
o c. it slows down the reaction and makes
essential biological functions take too long.
o d. there's a missing chemical that gets
used in the reaction.

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

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

Organelles found in plant cells that function through photosynthesis to produce glucose from carbon dioxide and water are called — question 21 options: chloroplasts guard cells photosynthons