<span>They exhibit all the stages when its the presence of oxygen only.</span>
Take a dna test... he will be more confident about it then
Answer:
All of the answer options are correct.
Explanation:
Chargaff contributed in understanding the structure and composition of DNA with his discoveries. He discovered that purine and pyrimidine bases are in equal amounts in a DNA molecule. He also discovered that amount of Adenine base (A) is equal to amount of Thymine base (T). It means that A pairs with T. Since A is a purine and T is a pyrimidine it also implies that purine base pairs with a pyrimidine base. This conclusion can also be arrived by taking in consideration the other base pair which is G (purine) and C (pyrimidine).
This sounds like a test cross. Because P is dominant, the purple flower could have a genotype of Pp or PP. If all of the offspring of the test cross are purple, then the purple flower has genotype PP. If half of the offspring of the test cross have purple and half have white, then the purple parental flower's genotype is Pp.
Answer and Explanation:
The factors that make up the environment are classified into abiotic or non-living and biotic or living. The abiotic factors are further classified into those that act upon the organism through the atmosphere and those that act through the soil. The abiotic factors include water, temperature, light, salinity and oxygen availability. The biotic factors include predation, competition and parasitism.
