Wegener's original name for the supercontinent was
when two tectonic plates converge and one slips under the other, a zone is formed.
the movement of a tectonic plate away from a mid-ocean ridge can be measured by the orientation of the field.
the process of heating the mantle from the core of the earth causes expansion and movement of material in a cell, which is partly responsible for the movement of continents.
gravity is also responsible for the movement of continents in two ways: through at subduction zones as gravity drags a plate downward, and through as gravity pushes plates downslope, away from the center.
when two opposing plates meet and scrape against one another at a fault, stress is created when the two moving plates catch or stick together. as this stress is released, a/an occurs.
the ring of fire is a region of intense volcanic and seismic activity that borders the plate.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

1 digestive system

2 stomach

3 bladder

4 carbon deoxide

5 tiger

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up