Earth/ space science answer quickly and ill give you brainliest. during which eon did oxygen first appear in the atmosphere? a. hadean b. archean c. proterozoic d. phanerozoic

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

The sea slug that considered to be a photosyntheesizing animal

Which of these would most likely be a stimulus that would cause the body to initiate feedback mechanisms a.) normal body temperature in an arctic environment b.) normal boy temperature in a tropical environment c.)light physical activity d.)low blood sugar