Question 3 of 20 :
Select the best answer for the question.
3. Sickle-cell anemia is caused by a
mutation in the gene encoding
hemoglobin, causing red blood cells
to appear
na oborinal

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

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above

What are the proteins in connectivity tissues of your foot examples of?