Biomass decays and produces gases such as nitrogen and very small amount of helium. in many places it is used to produce energy by comustion.it's mass becomes less and a layer of humus type organic substance is left on the soil....if i'm not incorrect :)
Let us assign the
recessive allele for freckle to be f and
the dominant F. According to the statement, we deduce that ff = 0.04.
The frequency of the recessive f allele is, therefore, is
0.2 (square root of 0.04 ).
Hardy-Weinburg p + q = 1
P + 0.2 = 1; p = 1- 0.2 = 0.8
Therefore using the Hardy-Weinburg equation of a population
in equilibrium
P2+2pq+q2=1
Heterozygous individuals are;
2pq = 2*0.8*0.2 = 0.32
This is 32% of the population
Answer
D. nitrogen, oxygen, and trace amounts of other gases.
Explanation:
Earth is composed of an atmosphere that sustains life. It protects its inhabitant against direct radiation from the sun that could be of adverse effect. The earth consist of Nitrogen-78%, oxygen-21%, carbindioxize- 0.04%, Argon - 0.93% and trace element such us helium, hydrogen, krypton and water vapour. The earth consist of 5 different layers this include the stratosphere, thermosphere,
Atmosphere, troposphere, Mesosphere.
Earth is the only planets that sustains life and its has the ability to accommodate different living organism because of its diverse climatic condition.
Option D is the answer because Nitrogen and oxygen are contain in large amount and otherwise trace quantity.
