What hormone stimulates the secretion of lh?
a. testosterone
b. estrogen
c. progesterone
d. gnrh

The correct answer will be option-D.

Explanation:

Luteinizing hormone or LH is a hormone co-secreted with the FSH in the gonadotrophin cells of the anterior pituitary of the endocrine system in the brain.

The chemical nature of LH is a glycoprotein which is secreted in response to the gonadotropin-releasing hormone (GnRH) pulses and frequency. The LH secretion is controlled by the feedback mechanism as it is inhibited by the estrogen in females and testosterone in males. The LH in males stimulates the release of testosterone in males and estrogen in females.

Thus, option-D is the correct answer.

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.