The hormone responsible for the development of secondary sexual characteristics in females is:
A. Progesterone
B. Prolactin
C. Testosterone
D. Estrogen
Answer: Option D
Solution (By JKExamLibrary)
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:
Phloem transports organic solutes (mainly sucrose) from source (leaves) to sink (roots, fruits) in a process called translocation, using sieve tubes and companion cells. Xylem transports water and minerals from roots upwards. Collenchyma and sclerenchyma are mechanical tissues providing support. Phloem is alive at maturity, while xylem vessels are dead. Companion cells regulate sieve tube activity.
Explanation:
Secretin is released from the duodenum when acidic chyme enters, stimulating the pancreas to secrete bicarbonate-rich fluid, neutralizing the acid.
Explanation:
Epilepsy is a neurological disorder marked by recurrent seizures caused by excessive and synchronous neuronal firing. Stroke is from interrupted blood supply, MS is demyelination, meningitis is inflammation of meninges.
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