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In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt, what percentage of the offspring will be tall with red fruit?
The drug RU-486 is taken after sexual intercourse. It blocks implantation, and in this sense it prevents pregnancy:
In the equation $GPP - R = NPP$, R represents :
In some plants, the female gamete develops into an embryo without fertilization. This phenomenon is known as:
Which of the following statement is not correct regarding a rhizome?
Perigynous flowers are found in:
Coconut milk factor is:
Which of the following is correct regarding HIV, hepatitis B, gonorrhoea, trichomoniasis?
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree:
Consider the two surgical procedures (A and B) given below and choose the correct statement:
Progesterone alone or in combination with estrogen can also be used as contraceptives by females as injections or implants under their skin. When used in this manner, they:
Identify the correct set of statements: (a) The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea. (b) Axillary buds form slender and spirally coiled tendrils in Cucumber and Pumpkin. (c) Stem is flattened and fleshy in Opuntia and modified to perform the function of leaves. (d) Rhizophora shows vertically upward growing roots that help to get oxygen for respiration. (e) Subaerially growing stems in grasses and strawberry help in vegetative propagation.
In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?
I: Male condoms are disposable, female condoms are not. II: Male and female condoms, both, are disposable. III: Condoms are not disposable in general. IV: Condoms cannot be self-inserted. What is true from the above statements?
How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
Which of the following pairs is of unicellular algae?
Which of the following is an abortion pill?
Identify the contraceptive methods A, B, C, D, and E from the list below (corresponding to standard NCERT diagrams): I. Tubectomy II. Vasectomy III. Implants IV. Condoms V. Copper T VI. Cervical caps
The site of perception of light in plants during photoperiodism is
Consider the following four statements A, B, C & D and select the right option for two correct statements: (A) In vexillary aestivation, the large posterior petal is called standard, two lateral ones are wings and two small anterior petals are termed keel (B) The floral formula for Liliaceae is ⊕ ⚥ P(3+3) A3+3 G(3) (C) In pea flower the stamens are monadelphous (D) The floral formula for Solanaceae is ⊕ ⚥ K(3) C(3) A(4) G(2) The correct statements are: