Answer:
The given blank can be filled with the steady state theory.
Explanation:
The theory based on the perfect cosmological principle is the steady-state theory. On the basis of this theory, the universe is isotropic, homogenous, and immutable. This hypothesis did not reject the expansion of the universe, however, it believed in the spontaneous generation of matter to counteract the observed expansion, that is, maintaining the average density same.
This theory was suggested by Bondi, Hoyle, and Gold in 1948. The steady-state theory lost its objectives when the discovery of the cosmic background radiation was done.
Explanation:
group b. is called the control group. it is important to compare the 2 groups for any similarities. this determines if the medications in group a are working like intended. to keep track of side effects w/group a..
Hydrogen and oxygen which makes up h2o / water
Answer:
plywoods boxes
Explanation:
Spraying the pesticides on plywood boxes seems a better alternative as this method is used to check the time it takes for the pesticide to dissipate.