Consider the diagram
common ancestor
common ancestor
homo erectus
homo neanderthalensis
(neanderthals)
homo sapiens
(modern humans)
which statement is supported by the diagram?
homo erectus was a tool user
homo erectus is an ancestor of homo sapiens.
some ancestors can be on several branches in the hominids.
some ancestors of homo sapiens have not yet been identified.
mark this and return
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How are organisms in the domain eukarya different from those in the domain archaea? o a. eukaryotes have a cell wall. o b. eukaryotes have mitochondria. o c. eukaryotes have more than one cell. o d. eukaryotes have dna. submit

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium