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Given below are two statements regarding oogenesis. Statement I: The primary follicles get surrounded by more layers of granulosa cells, a theca and shows fluid filled cavity antrum. Now it is called secondary follicle. Statement II: Graafian follicle ruptures to release the secondary oocyte from the ovary by the process called ovulation. In the light of the above statements, choose the correct answer from the options given below:
Match List-I with List-II: List-I (A) Auxin (B) Gibberellin (C) Cytokinin (D) Ethylene List-II (I) Promotes female flower formation in cucumber (II) Overcoming apical dominance (III) Increase in the length of grape stalks (IV) Promotes flowering in pineapple
Which one of the following pairs of chemical substances is correctly categorised?
Match List-I with List-II: List-I (a) Ammonotelism (b) Uricotelism (c) Micturition (d) ADH List-II (i) Birds (ii) Water reabsorption (iii) Bony fish (iv) Urinary bladder
A certain road accident patient with an unknown blood group needs an immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
The phenomenon which is influenced by auxin and also played a major role in its discovery is:
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Endometrium is necessary for implantation of blastocyst. Reason (R): In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium. In the light of the above statements, choose the correct answer from the options given below:
The permissible use of the technique amniocentesis is for:
Select the correct statement regarding the mechanism of muscle contraction.
Arrange the following formed elements in the decreasing order of their abundance in blood in humans: (a) Platelets (b) Neutrophils (c) Erythrocytes (d) Eosinophils (e) Monocytes
Given below is a diagrammatic sketch of a portion of the human male reproductive system. Select the correct set of the names of the parts labelled A, B, C, and D:
Pills: I. Inhibit ovulation and implantation II. Alter the quality of cervical mucus to prevent or retard the entry of sperms III. Prevent the ejaculated semen from entering the female vagina IV. Inhibit spermatogenesis Which of the above statements are correct?
Match the items given in Column-I with those in Column-II and select the correct option given below: Column-I (a) Cristae (b) Cisternae (c) Thylakoids Column-II (i) Flat membranous sacs in stroma (ii) Infoldings in mitochondria (iii) Disc-shaped sacs in Golgi apparatus
To avoid transmission of STDs: I. Avoid sex with multiple partners. II. Always have unprotected sex. III. Use condoms during coitus. IV. Avoid sex with unknown partners V. Avoid sharing of needles Which of the above statements are correct?
Antiparallel strands of a DNA molecule mean that:
Given below are two statements: Statement I: The release of sperms into the seminiferous tubules is called spermiation. Statement II: Spermiogenesis is the process of formation of sperms from spermatogonia. In the light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements: Statement I: Degeneration of corpus luteum in the absence of fertilization is the cause for disintegration of endometrium. Statement II: Cyclic menstruation indicates normal reproductive phase in human females and extends between menarche and menopause. In the light of the above statements, choose the correct answer from the options given below:
Birth control pills contain synthetic estrogen and progesterone. How might these hormones prevent pregnancy?
Select the correct option of haploid cells from the following groups:
In some plants, the female gamete develops into an embryo without fertilization. This phenomenon is known as: