The type of immunity that occurs after recovery from an infection is: MCQ with Answer and Explanation

Explanation:
Proximal convoluted tubule reabsorbs glucose, amino acids, and most water. Bowman’s capsule surrounds glomerulus; filtrate lacks proteins and cells; collecting duct concentrates urine.

Explanation:
Estrogen promotes ductal growth in breasts and deposition of fat, contributing to breast development at puberty. Progesterone develops alveoli, prolactin synthesizes milk, oxytocin ejects milk.

Explanation:
Genetic variation within a population provides the raw material upon which evolutionary forces act; without variation, evolution cannot occur. Natural selection acts directly on the phenotype (observable traits) of an organism, determining its survival and reproductive success. However, evolution is a population-level phenomenon; it involves changes in allele frequencies over generations, not changes occurring within a single individual's lifetime. Thus, statements 1 and 2 are correct.