General evolution Flashcards
1
Q
The planet consists of what animal?
A
invertebrates
2
Q
How old is the Earth?
A
about 4.6 billion years old
3
Q
How old are rocks?
A
about 3.8 billion years old.
4
Q
How old are prokaryotic fossils?
A
3.5 billion years old.
5
Q
What is radial symetry?
A
similar form with respect to a
center point in all directions(jellyfish, corals)
6
Q
What is bilateral symetry?
A
plane of symmetry, with similar form on either side
of the plane; also involves an anterior and posterior (e.g., worms, lobsters)
7
Q
What is symetric cleavege?
A
radial: in deuterostome
8
Q
What is asemetric cleavage?
A
bilateral: in protostome
9
Q
What is deutrostome?
A
the anus develops before the mouth
10
Q
What is a protostome?
A
forms both mouth and anus
