In humans muscular dystrophy (m. d.) is caused by a recessive allele on the X chromosome. Draw a punnett square to show how two unaffected people can have a child with muscular
dystrophy.
a. Genotypic ratio
b. Phenotypic ratio
e. Is the child with muscular dystrophy a male or a female?
d. What's the probability that their next child will have m. d.?
e. What percentage of the male children will have m. d.?
f. What percentage of the female children will have m. d.?

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

a compound light microscope is used to magnify objects in steps.  

hope it

not always but somethings can be reproduced in a laboratory.

because photosynthesis could not occur (apex)