Answer: Structure of an Animal Cell
Explanation:
The first part of the cell theory states that all living things, whether small or big, simple or complex, irrespective of species or kingdoms, are made up of either one or more than one cells. Living things or organisms that are made up of one cell are called unicellular or single-celled organisms.
Vertebrates have a back bone. They have living endoskeleton, pharnyx and efficient respiration, advanced nervous system, and paried limbs.
Answer: B) Compounds contain two or more elements
Explanation:
For Absolute dating they assign a numerical date to each rock layer studied
For relative dating they go Through geological dating and stratigraphy processes. Also, they use Uranium Dating.
Answer:
gene flow
Explanation:
Gene flow, in simple terms, is a transfer of gene from one population to another. Also called as migration, where there is movement of individuals, and the genetic material they carry from one population to another. It also involves successful breeding of these individuals in their new locations. When people with sickle cell anemia were brought into the US, transfer of the gene responsible for sickle cell disease changed the frequency of the sickle cell allele in overall US population.
