D. A struggle for existence is apparent.
If a struggle for existence is apparent, natural selection occurs because all of the weak/unfit/unadapted ones die.
Answer:
Retinoblastoma is more common in people due to the mutation of RB gene in them.
Explanation:
Retinoblastoma is a disease that affects the eyes of an individual. It is more commonly eye cancer which occurs on the retina of the eye. Retinoblastoma mainly affects younger children.
When the RB gene is mutated or it is deleted already on any one of a homologous chromosomes, then only one hit rather that two which is needed to cause the development of retinoblastoma and hence the probability is of retinoblastoma to occur is higher in the individuals who have already inherited the RB deletion and also have a genetic predisposition for the retinoblastoma.
In 1953, he developed a method to make strains of wheat highly resistant to a single form of rust.<span>
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Mark the difference between Meiosis and Mitosis below.
- In mitosis the daughter cells are diploids.
- In meiosis the daughter cells are haploids.
Only second generation is asked so the product is 1 diploid only.
There is less liquid water on Earth.
