Q6: A
Q7:D
Q8:C
Reasoning
Q6: Based on all the other questions talking about common ancestors I deduced that to find a “common” ancestor they need to find things that are the same.
Q7: All arthropod have a exo skeleton for example a lobster or crab. They all have a head, abdomen and thorax for example ants. They all have legs with joints for example a spider.
Q7:So bones are traveled down by ancestors so the types of bones stay the same but natural selection has changed them to better fit their environment.
Extend the wrist.
Hope that helps :)
carbon dioxide into oxygen i think
The weather of the United States east of the Rocky Mountains is dominated by large
masses of air that travel south from the wide expanses of land in Canada, and north from
the warm waters of the Gulf of Mexico. Not surprisingly, the term air mass means a
large body of air (sometimes as large as one million square miles!) that can be
characterized by their temperature and humidity. Such large bodies of air form over large
portions of the surface of the Earth, and we use the term source region to describe the
areas of the Earth over which large air masses form.
The diagram below shows the major source regions and air masses for the United States:
Answer:
The correct answer is - 1.2 cm.
Explanation:
The retention factor is represented by Rf.
Given:
Rf of species A is = 0.5
Rf of species B is = 0.6
Formula:
Rf = distance the compound moves/distance the solvent moves
Rf(A)/Rf(B) = 
Rf(A)/Rf(B) = distance moved by A/distance moved by B
0.5/0.6 = 1/distance moved by B
distance moved by B = 0.5/0.6
= 1.2 cm
