Consider statements about plant tissues: 1. Xylem transports water upwards. 2. Phloem transports food bidirectionally. 3. Cambium is a permanent tissue. Which are correct? MCQ with Answer and Explanation

Explanation:
Selman Waksman and his team isolated streptomycin from the soil bacterium Streptomyces griseus in 1943. It was the first effective antibiotic against tuberculosis. Fleming discovered penicillin, Pasteur developed rabies vaccine, Koch identified tuberculosis bacillus. Waksman coined the term 'antibiotic'.

Explanation:
Ethology is the branch of biology that deals with the scientific and objective study of animal behavior, usually with a focus on behavior under natural conditions. Ecology studies ecosystems, Entomology studies insects, and Eugenics deals with the improvement of human genetic traits.

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.