Life on Earth is possible because the Sun provides Earth with heat and light. Which of the following is true? A.
Almost all of the Sun's light energy reaches the Earth.
B.
About half of the Sun's light energy reaches the Earth.
C.
Only a tiny fraction of the Sun's light energy reaches the Earth.
D.
About a quarter of the Sun's light energy reaches the Earth.

Based on the results of this study, what questions remain unanswered? how can these questions guide future research

This is the amino acid cysteine. circle the amine group, put a box aroundthe carboxylic acid group and use a different colored pencil/pen to circle the sidechain (r group). h o | ||nh2— c- c-oh | ch2 | sh

The table below shows the number of foot bones in some horse fossils. horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s