Biotic factors include plants, animals, microbes, etc. The important abiotic factors include the amount of sunlight in the ecosystem, the amount of oxygen and nutrients that is dissolved in the water, temperature, etc. Sunlight is one of the most important abiotic factors for marine ecosystems.
A recessive trait is observed when an organism has 2 recessive genetic factor
Answer: Option C
<u>Explanation:</u>
According to the Mendel’s law of inheritance there are two traits. Dominant and recessive. Usually the recessive are submissive genes which cannot express their characteristics. The dominant trait are the ones which expresses the characteristics.
Two copies of recessive allele are required for the recessive trait to be produced. The recessive trait will be expressed by each parent contributing one allele towards the offspring.
Q, R are the correct answers respectively
C. Depression
Due to it asking about Psychological rather than Physical effects.