Consider statements about microorganisms: 1. Penicillin is extracted from a fungus. 2. Streptomycin is extracted from a bacterium. 3. Viruses can be cultured in synthetic media. Which are correct? MCQ with Answer and Explanation

Explanation:
Estrogen, secreted by the developing ovarian follicles, promotes the development of female secondary sexual characteristics such as breast development, widening of hips, and distribution of body fat. Testosterone is the male sex hormone. Progesterone prepares the uterus for pregnancy, and prolactin stimulates milk production.

Explanation:
Convergent evolution occurs when distantly related organisms independently evolve similar traits or structures to adapt to similar ecological niches or environmental pressures. The resulting structures are called analogous organs (e.g., wings of birds and insects, eyes of octopuses and mammals). Divergent evolution is when related species evolve different traits (homologous organs). Coevolution is when two species evolve in response to each other.

Explanation:
The pituitary gland, located at the base of the brain, controls other endocrine glands through its hormones (e.g., TSH, ACTH, FSH, LH). Hence, it is called the master gland. The hypothalamus regulates the pituitary via releasing and inhibiting hormones. Thyroid secretes thyroxine, adrenal secretes adrenaline, pancreas (endocrine part) secretes insulin and glucagon. The pituitary has two lobes: anterior and posterior.