7th grade science 8 Flashcards
1
Q
Embryology
A
The study of embryos and their development
2
Q
Homologous
A
Body parts that are similar in origin and structure
3
Q
Radioactive elements
A
An element that gives off a steady amount of radiation as it slowly changes to a nonradioactive element
4
Q
Sedimentary rock
A
Rock in which most fossils are found; formed when layers of sand, silt, clay, or mud are pressed and cemented together, or when minerals are deposited from a solution
5
Q
Vestigial structures
A
Structures that do not seem to have a function
6
Q
Hominids
A
Humanlike primates and left about 4,000,000 to 6,000,000 years ago and were different from other primates
7
Q
Homo sapiens
A
Direct ancestors of humans
8
Q
Primate
A
Group of mammals to which humans, monkeys, and apes belong
