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.
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All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Amniocentesis is a process in which amniotic fluid is taken from the mother's womb to identify any genetic abnormalities in the fetus. how would the discovery of the human genome contribute to this process?

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.