Who was Lucy, the Australopithecus afarensis? A
a scientist who came up with the system of classification
B
an extinct hominid who lived about 3 million years ago
С
a paleoanthropologist who discovered an extinct hominid
D
the last known member of the order Primates

The reactions of photosynthesis occur in the of plant cell? a.mitochondria. b. lysosomes. c. chloroplasts. d. chlorophyll

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.