When the organic matter in soil decomposes, it creates a layer called topsoil.
Answer:
40 individuals
Explanation:
The homozygous recessive percentage is equal to q2.
Recessive genotype frequency, q 2 is 1/1000000 = 0.000001
therefore, q = 
= 
= 0.001 = allele "a" frequency
and p + q = 1, thus, p = 1 – q = 1 – 0.001 = 0.999
thus, the frequency of allele a = q = 0.001 and the frequency of allele A = p = 0.999
Carriers are heterozygous and are equal to 2pq.
So, 2pq = 2 x 0.999 x 0.001 x 20,000 = 39.96 (round of to 40)
Hence, 40 individuals will be expected to carry the recessive allele.
The answer to this question is <span>membrane potential
The gradient of electrolyte concentration from inside cell and outside cell will determine the membrane potential. Natrium or sodium is much higher outside the cell than inside cell. In contrast to the sodium, potassium is much more inside cells. This two electrolyte have major role in the membrane potential and action potential. </span>
Answer: The dependent variable.
Explanation: Experimental studies are designed to find relationships between one variable and another.
Answer:
The chromosomes move to a narrow central zone of the cell
Explanation:
Prophase: nuclear and cell membrane start to disappear
Metaphase: The chromosomes line up in the equator
Anaphase: Spindle fibres pull the chromosomes towards the poles
Telophase: Nuclear and cell membrane start to form
I hope it useful
