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Match the following concerning the activity/function and the phytohormone involved: Column-I (Activity/Function) Column-II (Phytohormone) (a) Fruit ripening (i) Abscisic acid (b) Herbicide (ii) Ethylene (c) Bolting (iii) Auxin (d) Stress hormone (iv) Gibberellic acid
A prokaryotic autotrophic nitrogen-fixing symbiont is found in:
Select the correct statements regarding cell division stages.
Examine the figure given below and select the right option giving all the four parts (A, B, C and D) correctly identified:
Match List-I with List-II regarding the stages of the Cell Cycle: List-I A. G1 phase B. S phase C. G2 phase D. G0 phase List-II I. Quiescent stage II. Replication of DNA III. Interval between mitosis and initiation of DNA replication IV. Proteins are synthesised in preparation for mitosis
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): In gymnosperms, the pollen grains are released from the microsporangium and carried by air currents. Reason (R): Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed. In the light of the above statements, choose the correct answer from the options given below:
Read the following statements and choose the set of correct statements regarding the members of Phaeophyceae (Brown Algae): A. Asexual reproduction occurs usually by biflagellate zoospores. B. Sexual reproduction is by oogamous method only. C. Stored food is in the form of carbohydrates which is either mannitol or laminarin. D. The major pigments found are chlorophyll a, c and carotenoids and xanthophyll. E. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin.
Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?
In case of a couple, where the male is having a very low sperm count, which technique will be suitable for fertilisation?
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:
Match List I with List II: List I A. Fibrous joints B. Cartilaginous joints C. Hinge joints D. Ball and socket joints List II I. Adjacent vertebrae, limited movement II. Humerus and Pectoral girdle, rotational movement III. Skull, don't allow any movement IV. Knee, help in locomotion
Three types of muscles are given as a, b and c. Identify the correct matching pair along with their location in human body:
Match Column-I with Column-II and select the correct option using the codes given below:
Removal of shoot tips is a very useful technique to boost the production of tea leaves. This is because:
Select the correct sequence for the transport of sperm cells in the male reproductive system:
Which one of the following is the correct match of the events occurring during the menstrual cycle?
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): FSH acts upon ovarian follicles in female and Leydig cells in male. Reason (R): Growing ovarian follicles secrete estrogen in female while interstitial cells secrete androgen in male human being. In the light of the above statements, choose the correct answer from the options given below:
Read the following statements on plant growth and development. Which of the following is incorrect?
Given below are two statements: Assertion (A): Osteoporosis is characterised by decreased bone mass and increased chances of fractures. Reason (R): Common cause of osteoporosis is increased levels of estrogen. In the light of the above statements, choose the most appropriate answer from the options given below:
Match the following with respect to meiosis: (a) Zygotene, (b) Pachytene, (c) Diplotene, (d) Diakinesis. (i) Terminalization, (ii) Chiasmata, (iii) Crossing over, (iv) Synapsis.