Aldosterone and cortisol are secreted by adrenal cortex.

Zea mays and Saccharum officinarum are examples of C₄ plants.

Melatonin is a hormone secreted by the pineal gland in the brain.

Correct answer. Adrenocorticotrophic hormone (ACTH), luteinizing hormone (LH) and thyroid stimulating hormone (TSH) are secreted by pars distalis region of adenohypophysis of pituitary gland.

In 1961, Peter Mitchell proposed chemiosmotic hypothesis of ATP synthesis in light reaction.

Actinomycin is obtained from Streptomyces antibioticus.

Crotalaria is a genus of herbaceous plants and woody shrubs in the family Fabaceae. It is used as a green manure crop.

Tryptophan is the metabolic precursor to serotonin and the pineal hormone melatonin.

Serotonin or 5-hydroxytryptamine is a monoamine neurotransmitter. Epinephrine (also known as adrenaline or 4, 5-β-trihydroxy-N-methylphenethylamine) is a hormone and a neurotransmitter. Melatonin, also known chemically as N-acetyl-5-methoxytryptamine, is a hormone found in animals, plants and microbes. Dopamine (3, 4-dihydroxyphenethylamine) is a neuroendocrine transmitter in the catecholamine and phenethylamine families.

Kranz type leaf anatomy is found in C₄ plants. Leaves of C₃ plants do not show Kranz anatomy. C₃ plants occur in all types of climates, whereas C₄ plants occur in tropical climates.

Potato and ginger are underground modifications of stem.

Parathyroid hormone (PTH) is a hypercalcemic hormone, i.e., it increases the blood Ca²⁺ levels. The atrial wall of our heart secretes a peptide hormone called atrial natriuretic factor (ANF). When blood pressure is increased, ANF is secreted which causes dilation of the blood vessels. This reduces the blood pressure. Antidiuretic hormone, also known commonly as vasopressin, is a nine amino acid peptide secreted from the posterior pituitary. Gonadotropes are endocrine cells in the anterior pituitary that produce the gonadotropins, such as the follicle-stimulating hormone (FSH) and luteinizing hormone (LH).

Cyme is flat-topped inflorescence with the oldest flowers at the end of the main axis.

Nucellus, integuments and megasporocyte: All are diploid structures.

The molecular formula of chlorophyll a is C₅₅H₇₂O₅N₄Mg.

Erwinia carotovora is known as the pathogen of hollow stalk disease in tobacco. Wildfire of tobacco is caused by Pseudomonas syringae. Ralstonia solanacearum caused granville wilt in tobacco plant. Rhodococcus fascians causes leafy gall disease in tobacco.

Totipotency is the ability of a single cell to divide and produce all of the differentiated cells in an organism. Apogamy is the formation of sporophyte directly from gametophyte without gamete formation. Allogamy is the term used for cross pollination. Apomixis is the formation of new individuals directly through asexual reproduction without involving the formation and fusion of gametes.