Which of the following is an example of a mutualistic symbiosis? MCQ with Answer and Explanation

Explanation:
Root hairs, unicellular extensions of epidermal cells in the root maturation zone, greatly increase surface area for water and mineral absorption from the soil. Water enters by osmosis. Leaves absorb some water through stomata but primarily lose water. The stem transports, and flowers are reproductive.

Explanation:
The Hardy-Weinberg equation is a fundamental principle in population genetics used to calculate the expected frequencies of genotypes in a population that is not evolving (in genetic equilibrium). 'p' represents the frequency of the dominant allele, and 'q' represents the frequency of the recessive allele. p^2 is the frequency of the homozygous dominant genotype, 2pq is the heterozygous genotype, and q^2 is the homozygous recessive genotype.

Explanation:
The humerus is the single, long bone of the upper arm, connecting the shoulder to the elbow. The radius and ulna are the two parallel bones of the forearm (lower arm), connecting the elbow to the wrist. The patella, commonly known as the kneecap, is a small, flat, triangular bone located at the front of the knee joint, not in the skull. Thus, statements 1 and 2 are correct.