JSIERT

Cytokinins Hormone In the process of cytokinesis, cytokinins are important. Plants that experience fast cell division, such as those with root apices, shoot buds, early fruits, etc., naturally produce cytokinins. Cytokinins migrate in a polar and basipetal manner. Natural: Isopentenyl adenine, zeatin (corn kernels, coconut milk). Synthetic: thidiazuron, kinetin, benzyladenine, and diphenylurea. Functions of Cytokinins hormone: …

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(B)Gibberellins Hormone More than 100 gibberellins (GA1, GA2, GA3…..) are known. They are acidic. These are found in higher plants and fungi. Functions of Gibberellins : (i) promotes bolting, which is the sudden elongation of internodes in mound plants like cabbage and beets just before flowering (ii) delays senescence (iii) helps to parthenocarpy (iv) stem …

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Auxin Hormone Auxin means “to grow”. They are mostly used in agricultural and horticultural practices. They are found in the growing apex of roots and stems. Natural: Indole-3-acetic acid (IAA), Indole butyric acid (IBA)Synthetic: 2,4-D (2,4-Dichlorophenoxyacetic acid), NAA (Naphthalene acetic acid) Functions of Auxin : (i)The elongation of stem and root cells (ii) IAA in the apical bud inhibits …

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All of the growth and development activities, including cell division, enlargement, flowering, seed formation, dormancy, and abscission, are regulated by plant hormones. Plant hormones are divided into two categories based on how they act:Plant Growth PromotersPlant Growth Inhibitors.

Plant hormone (phytohormone) “Organic compounds called as phytohormones are found in extremely small amounts in plants. They control the growth, reproduction, survival, and development of plants.” Let’s now examine the composition and uses of various phytohormones, like (i) Auxins, (ii) Gibberellins, (iii) Cytokinins, (iv) Ethylene, and (v) Abscisic acid.

Plant hormone (phytohormone) Organic compounds called as phytohormones are found in extremely small amounts in plants. They control the growth, reproduction, survival, and development of plants. Let’s now examine the composition and uses of various phytohormones, like (i) Auxins, (ii) Gibberellins, (iii) Cytokinins, (iv) Ethylene, and (v) Abscisic acid. What are the main functions of …

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Q1 ASSERTION (A): a nerve impulse is an electrochemical event. REASON(R): In a nerve impulse there are changes in the resting potential which spread down the nerve fibre. Ans :- (a) R is the correct explanation for A, and both A and R are true. Q2 ASSERTION (A): Insulin regulates blood sugar level. REASON(R): insufficient …

The following two question consists of two statements Assertion (A) and Reason (R) answer these questions by choosing the relevant selection from the list below. (a) Both A and R are true and R is the correct explanation for A (b) Both A and R are true and R is not the correct explanation for A (c) A is true but R is false (d) A is false but R is true Read More »

Functions of brain Parts The fore brain The fore brain is the main part of the brain responsible for thinking. It has areas where different receptors send sensory impulses. The forebrain has several regions that are specialised for hearing, smell, sight, and other senses The cerebrum is responsible for sensory processing. Which coordinates all voluntary …

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Structure of a neuron The neuron is a highly specialized cell responsible for the transmission of nerve impulses. The soma or cell body is a structure like a star with hairs. Dendrites are formations that resemble hair. Nerve impulses are received by dendrites. The axon, which is the nucleus’ tail, terminates in hair-like structures that …

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a) Pituitary gland is present in the brain, so it is associated with the brain. b) The pancreas secretes digestive enzymes as well as hormones. That’s why it is called the endocrine as well as the endocrine gland. c) Adrenal gland is present top of the kidneys. It is associated with kidneys. d) The testis …

Answer the following :
(a) Name the endocrine gland associated with brain?
(b) Which gland secretes digestive enzymes as well as hormones?
(c) Name the endocrine gland associated with kidneys?
(d) Which endocrine gland is present in males but not in females? Read More »